From db2686c798378738020a0951a521358586e21aa0 Mon Sep 17 00:00:00 2001
From: Santo Cariotti <santo@dcariotti.me>
Date: Fri, 9 Feb 2024 11:42:04 +0100
Subject: Add day2 in OCaml

---
 2023/rust/Cargo.toml         |    2 +
 2023/rust/day1/Cargo.toml    |    8 +
 2023/rust/day1/example.txt   |    4 +
 2023/rust/day1/example2.txt  |    7 +
 2023/rust/day1/input.txt     | 1001 +++++++++++++++++++++++++++++++
 2023/rust/day1/input2.txt    | 1000 +++++++++++++++++++++++++++++++
 2023/rust/day1/src/lib.rs    |   97 +++
 2023/rust/day11/Cargo.toml   |    8 +
 2023/rust/day11/example.txt  |   10 +
 2023/rust/day11/input.txt    |  140 +++++
 2023/rust/day11/src/lib.rs   |  130 ++++
 2023/rust/day13/Cargo.toml   |    8 +
 2023/rust/day13/example.txt  |   15 +
 2023/rust/day13/input.txt    | 1361 ++++++++++++++++++++++++++++++++++++++++++
 2023/rust/day13/src/lib.rs   |  146 +++++
 2023/rust/day15/Cargo.toml   |    8 +
 2023/rust/day15/example.txt  |    1 +
 2023/rust/day15/input.txt    |    1 +
 2023/rust/day15/src/lib.rs   |   56 ++
 2023/rust/day2/Cargo.toml    |    8 +
 2023/rust/day2/example.txt   |    5 +
 2023/rust/day2/input.txt     |  100 ++++
 2023/rust/day2/src/lib.rs    |   99 +++
 2023/rust/day3/Cargo.toml    |    8 +
 2023/rust/day3/example.txt   |   10 +
 2023/rust/day3/input.txt     |  140 +++++
 2023/rust/day3/src/lib.rs    |  184 ++++++
 2023/rust/day4/Cargo.toml    |    8 +
 2023/rust/day4/example.txt   |    6 +
 2023/rust/day4/input.txt     |  203 +++++++
 2023/rust/day4/src/lib.rs    |  132 ++++
 2023/rust/day5/Cargo.toml    |    8 +
 2023/rust/day5/example.txt   |   33 +
 2023/rust/day5/input.txt     |  237 ++++++++
 2023/rust/day5/src/lib.rs    |  159 +++++
 2023/rust/day6/Cargo.toml    |    8 +
 2023/rust/day6/example.txt   |    2 +
 2023/rust/day6/input.txt     |    3 +
 2023/rust/day6/src/lib.rs    |  102 ++++
 2023/rust/day7/Cargo.toml    |    8 +
 2023/rust/day7/example.txt   |    5 +
 2023/rust/day7/input.txt     | 1000 +++++++++++++++++++++++++++++++
 2023/rust/day7/src/lib.rs    |  153 +++++
 2023/rust/day7_2/Cargo.toml  |    8 +
 2023/rust/day7_2/example.txt |    5 +
 2023/rust/day7_2/input.txt   | 1000 +++++++++++++++++++++++++++++++
 2023/rust/day7_2/src/lib.rs  |  189 ++++++
 2023/rust/day8/Cargo.toml    |    8 +
 2023/rust/day8/example.txt   |    9 +
 2023/rust/day8/example2.txt  |   10 +
 2023/rust/day8/input.txt     |  796 ++++++++++++++++++++++++
 2023/rust/day8/src/lib.rs    |  115 ++++
 2023/rust/day9/Cargo.toml    |    8 +
 2023/rust/day9/example.txt   |    3 +
 2023/rust/day9/input.txt     |  200 +++++++
 2023/rust/day9/src/lib.rs    |  122 ++++
 56 files changed, 9097 insertions(+)
 create mode 100644 2023/rust/Cargo.toml
 create mode 100644 2023/rust/day1/Cargo.toml
 create mode 100644 2023/rust/day1/example.txt
 create mode 100644 2023/rust/day1/example2.txt
 create mode 100644 2023/rust/day1/input.txt
 create mode 100644 2023/rust/day1/input2.txt
 create mode 100644 2023/rust/day1/src/lib.rs
 create mode 100644 2023/rust/day11/Cargo.toml
 create mode 100644 2023/rust/day11/example.txt
 create mode 100644 2023/rust/day11/input.txt
 create mode 100644 2023/rust/day11/src/lib.rs
 create mode 100644 2023/rust/day13/Cargo.toml
 create mode 100644 2023/rust/day13/example.txt
 create mode 100644 2023/rust/day13/input.txt
 create mode 100644 2023/rust/day13/src/lib.rs
 create mode 100644 2023/rust/day15/Cargo.toml
 create mode 100644 2023/rust/day15/example.txt
 create mode 100644 2023/rust/day15/input.txt
 create mode 100644 2023/rust/day15/src/lib.rs
 create mode 100644 2023/rust/day2/Cargo.toml
 create mode 100644 2023/rust/day2/example.txt
 create mode 100644 2023/rust/day2/input.txt
 create mode 100644 2023/rust/day2/src/lib.rs
 create mode 100644 2023/rust/day3/Cargo.toml
 create mode 100644 2023/rust/day3/example.txt
 create mode 100644 2023/rust/day3/input.txt
 create mode 100644 2023/rust/day3/src/lib.rs
 create mode 100644 2023/rust/day4/Cargo.toml
 create mode 100644 2023/rust/day4/example.txt
 create mode 100644 2023/rust/day4/input.txt
 create mode 100644 2023/rust/day4/src/lib.rs
 create mode 100644 2023/rust/day5/Cargo.toml
 create mode 100644 2023/rust/day5/example.txt
 create mode 100644 2023/rust/day5/input.txt
 create mode 100644 2023/rust/day5/src/lib.rs
 create mode 100644 2023/rust/day6/Cargo.toml
 create mode 100644 2023/rust/day6/example.txt
 create mode 100644 2023/rust/day6/input.txt
 create mode 100644 2023/rust/day6/src/lib.rs
 create mode 100644 2023/rust/day7/Cargo.toml
 create mode 100644 2023/rust/day7/example.txt
 create mode 100644 2023/rust/day7/input.txt
 create mode 100644 2023/rust/day7/src/lib.rs
 create mode 100644 2023/rust/day7_2/Cargo.toml
 create mode 100644 2023/rust/day7_2/example.txt
 create mode 100644 2023/rust/day7_2/input.txt
 create mode 100644 2023/rust/day7_2/src/lib.rs
 create mode 100644 2023/rust/day8/Cargo.toml
 create mode 100644 2023/rust/day8/example.txt
 create mode 100644 2023/rust/day8/example2.txt
 create mode 100644 2023/rust/day8/input.txt
 create mode 100644 2023/rust/day8/src/lib.rs
 create mode 100644 2023/rust/day9/Cargo.toml
 create mode 100644 2023/rust/day9/example.txt
 create mode 100644 2023/rust/day9/input.txt
 create mode 100644 2023/rust/day9/src/lib.rs

(limited to '2023/rust')

diff --git a/2023/rust/Cargo.toml b/2023/rust/Cargo.toml
new file mode 100644
index 0000000..7f6cc11
--- /dev/null
+++ b/2023/rust/Cargo.toml
@@ -0,0 +1,2 @@
+[workspace]
+members = ["day1", "day2", "day3", "day4", "day5", "day6", "day7", "day7_2", "day8", "day9", "day11", "day13", "day15"]
diff --git a/2023/rust/day1/Cargo.toml b/2023/rust/day1/Cargo.toml
new file mode 100644
index 0000000..a3c4e52
--- /dev/null
+++ b/2023/rust/day1/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day1"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day1/example.txt b/2023/rust/day1/example.txt
new file mode 100644
index 0000000..7bbc69a
--- /dev/null
+++ b/2023/rust/day1/example.txt
@@ -0,0 +1,4 @@
+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet
diff --git a/2023/rust/day1/example2.txt b/2023/rust/day1/example2.txt
new file mode 100644
index 0000000..41aa89c
--- /dev/null
+++ b/2023/rust/day1/example2.txt
@@ -0,0 +1,7 @@
+two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen
diff --git a/2023/rust/day1/input.txt b/2023/rust/day1/input.txt
new file mode 100644
index 0000000..f2984df
--- /dev/null
+++ b/2023/rust/day1/input.txt
@@ -0,0 +1,1001 @@
+eightqrssm9httwogqshfxninepnfrppfzhsc
+one111jxlmc7tvklrmhdpsix
+bptwone4sixzzppg
+ninezfzseveneight5kjrjvtfjqt5nineone
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diff --git a/2023/rust/day1/input2.txt b/2023/rust/day1/input2.txt
new file mode 100644
index 0000000..a82beef
--- /dev/null
+++ b/2023/rust/day1/input2.txt
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diff --git a/2023/rust/day1/src/lib.rs b/2023/rust/day1/src/lib.rs
new file mode 100644
index 0000000..3240d6d
--- /dev/null
+++ b/2023/rust/day1/src/lib.rs
@@ -0,0 +1,97 @@
+pub fn part1(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    for line in input.split('\n') {
+        let mut d1: i32 = -1;
+        let mut d2: i32 = -1;
+        for ch in line.chars() {
+            if ch.is_digit(10) {
+                if d1 == -1 {
+                    d1 = ch.to_digit(10).unwrap() as i32 * 10;
+                }
+
+                d2 = ch.to_digit(10).unwrap() as i32;
+            }
+        }
+
+        if d1 + d2 > 0 {
+            res += (d1 + d2) as u32;
+        }
+    }
+
+    res
+}
+
+pub fn part2(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let hs: [(&str, u32); 18] = [
+        ("one", 1),
+        ("1", 1),
+        ("two", 2),
+        ("2", 2),
+        ("three", 3),
+        ("3", 3),
+        ("four", 4),
+        ("4", 4),
+        ("five", 5),
+        ("5", 5),
+        ("six", 6),
+        ("6", 6),
+        ("seven", 7),
+        ("7", 7),
+        ("eight", 8),
+        ("8", 8),
+        ("nine", 9),
+        ("9", 9),
+    ];
+
+    for (i, line) in input.strip_suffix('\n').unwrap().split('\n').enumerate() {
+        let mut idx: Vec<(i32, u32)> = vec![];
+        for (k, v) in &hs {
+            let ms: Vec<_> = line.match_indices(k).collect();
+            for m in ms.iter() {
+                idx.push((m.0 as i32, *v));
+            }
+        }
+
+        idx.sort_by(|a, b| a.0.cmp(&b.0));
+        println!("{i} {}", idx[0].1 * 10 + idx[idx.len() - 1].1);
+        res += idx[0].1 * 10 + idx[idx.len() - 1].1;
+    }
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 142);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 54159);
+    }
+
+    #[test]
+    fn example_part2() {
+        let input = include_str!("../example2.txt");
+        let result = part2(input);
+        assert_eq!(result, 281);
+    }
+
+    #[test]
+    fn input_part2() {
+        let input = include_str!("../input2.txt");
+        let result = part2(input);
+        assert_eq!(result, 53866);
+    }
+}
diff --git a/2023/rust/day11/Cargo.toml b/2023/rust/day11/Cargo.toml
new file mode 100644
index 0000000..8f5b9a5
--- /dev/null
+++ b/2023/rust/day11/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day11"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day11/example.txt b/2023/rust/day11/example.txt
new file mode 100644
index 0000000..986aad4
--- /dev/null
+++ b/2023/rust/day11/example.txt
@@ -0,0 +1,10 @@
+...#......
+.......#..
+#.........
+..........
+......#...
+.#........
+.........#
+..........
+.......#..
+#...#.....
diff --git a/2023/rust/day11/input.txt b/2023/rust/day11/input.txt
new file mode 100644
index 0000000..6ba87be
--- /dev/null
+++ b/2023/rust/day11/input.txt
@@ -0,0 +1,140 @@
+.......................................#..........................................................#......................................#..
+.....................#................................#.....................................................................................
+....#.....#...................#...............#....................#.....................#.....................#....................#.......
+............................................................................................................................................
+.................#......................................................#......#..............#....................#........................
+......................................#.....................................................................................................
+.......................................................#...................................................#..............#.................
+.............................................................#..........................#...................................................
+............#..............................#.................................#.................................................#............
+#.................................#.............#................#....................................................................#.....
+....................................................................................#................#......................................
+....#..........#............#...........................................#..................#..................#...................#.........
+......................................#...................#.................................................................#.............#.
+........#....................................#.......#......................................................................................
+........................................................................................#..........#........................................
+..#................................................................#........................................................................
+..............................#...............................................#.....................................#............#..........
+...................#........................................................................................................................
+...........#......................#........#................................................................................................
+...............................................................#.................#.........................#................................
+......................................................#.....................................#...............................................
+........#............................................................................#................................#.........#...........
+................#...........#...............................................................................................................
+.....................#........................#........................#.....................................#............................#.
+....#........................................................#................#.............................................#...............
+............................................................................................................................................
+.....................................................................................................#.............#...................#....
+..........................#...........#.........................................................................................#...........
+#......................................................#.........................................#............#........#....................
+.........#.....................................#....................................#.......................................................
+.................................#..................................#......................................................#........#.......
+.........................................................................................................#..................................
+......#.............#....................................................#..................................................................
+..........................#........................................................................................#........................
+.#.......................................#...................#...............#........................#..................#..................
+..................................#..............#...........................................................#.................#............
+.........#.........................................................#........................#...............................................
+....................................................................................#.......................................................
+.....#........#............................#...............................#.........................................#......................
+......................................................................#..................................#..................................
+............................#..................#........#..............................................................................#....
+.......................#.............#......................................................................................................
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+.#.............#......#.....................................................................................................................
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+.........#................#.....................................................#..............#.............#....................#.......#.
+..#..............................................................#.........................................................#................
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diff --git a/2023/rust/day11/src/lib.rs b/2023/rust/day11/src/lib.rs
new file mode 100644
index 0000000..66c95c4
--- /dev/null
+++ b/2023/rust/day11/src/lib.rs
@@ -0,0 +1,130 @@
+fn expand(m: &mut Vec<Vec<i16>>, ch: i16) {
+    let rows = m.len();
+    let mut cols = m[0].len();
+
+    let mut i = 0;
+    while i < rows {
+        if m[i].iter().filter(|&x| *x != 0).count() == 0 {
+            m.insert(i, vec![ch; cols]);
+            i += 1;
+        }
+        i += 1;
+    }
+    let rows = m.len();
+    i = 0;
+
+    while i < cols {
+        let mut c = 0;
+        for j in 0..rows {
+            if m[j][i] != 0 {
+                c += 1;
+            }
+        }
+
+        if c == 0 {
+            for j in 0..rows {
+                m[j].insert(i, ch);
+            }
+            cols += 1;
+            i += 1;
+        }
+        i += 1;
+    }
+}
+
+pub fn part1(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let mut m: Vec<Vec<i16>> = input
+        .trim_end()
+        .split('\n')
+        .map(|y| y.chars().map(|x| if x == '#' { 1 } else { 0 }).collect())
+        .collect();
+
+    expand(&mut m, 0);
+    let mut hs: Vec<(usize, usize)> = vec![];
+    let rows = m.len();
+    let cols = m[0].len();
+    for i in 0..rows {
+        for j in 0..cols {
+            if m[i][j] != 0 {
+                hs.push((i, j));
+            }
+        }
+    }
+
+    let n = hs.len();
+    for i in 0..n {
+        for j in i + 1..n {
+            res += ((hs[j].1 as i16 - hs[i].1 as i16).abs()
+                + (hs[j].0 as i16 - hs[i].0 as i16).abs()) as u32;
+        }
+    }
+
+    res
+}
+
+pub fn part2(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let mut m: Vec<Vec<i16>> = input
+        .trim_end()
+        .split('\n')
+        .map(|y| y.chars().map(|x| if x == '#' { 1 } else { 0 }).collect())
+        .collect();
+
+    expand(&mut m, 1);
+    let mut hs: Vec<(usize, usize)> = vec![];
+    let rows = m.len();
+    let cols = m[0].len();
+    for i in 0..rows {
+        for j in 0..cols {
+            if m[i][j] > 0 {
+                hs.push((i, j));
+            }
+        }
+    }
+
+    let n = hs.len();
+    for i in 0..n {
+        for j in i + 1..n {
+            res += ((hs[j].1 as i16 - hs[i].1 as i16).abs()
+                + (hs[j].0 as i16 - hs[i].0 as i16).abs()) as u32;
+        }
+    }
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 374);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 9623138);
+    }
+
+    #[test]
+    fn example_part2() {
+        let input = include_str!("../example.txt");
+        let result = part2(input);
+        assert_eq!(result, 1030);
+    }
+    //
+    // #[test]
+    // fn input_part2() {
+    //     let input = include_str!("../input.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 71585);
+    // }
+}
diff --git a/2023/rust/day13/Cargo.toml b/2023/rust/day13/Cargo.toml
new file mode 100644
index 0000000..36c9510
--- /dev/null
+++ b/2023/rust/day13/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day13"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day13/example.txt b/2023/rust/day13/example.txt
new file mode 100644
index 0000000..3b6b5cc
--- /dev/null
+++ b/2023/rust/day13/example.txt
@@ -0,0 +1,15 @@
+#.##..##.
+..#.##.#.
+##......#
+##......#
+..#.##.#.
+..##..##.
+#.#.##.#.
+
+#...##..#
+#....#..#
+..##..###
+#####.##.
+#####.##.
+..##..###
+#....#..#
diff --git a/2023/rust/day13/input.txt b/2023/rust/day13/input.txt
new file mode 100644
index 0000000..023748d
--- /dev/null
+++ b/2023/rust/day13/input.txt
@@ -0,0 +1,1361 @@
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diff --git a/2023/rust/day13/src/lib.rs b/2023/rust/day13/src/lib.rs
new file mode 100644
index 0000000..03af2b8
--- /dev/null
+++ b/2023/rust/day13/src/lib.rs
@@ -0,0 +1,146 @@
+pub fn part1(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let m: Vec<Vec<String>> = input
+        .trim_end()
+        .split("\n\n")
+        .map(|x| {
+            x.split('\n')
+                .map(|y| y.chars().collect::<String>())
+                .collect()
+        })
+        .collect();
+
+    for s in m {
+        let n = s.len();
+
+        // Search by column
+        //  012345678
+        //      ><
+        //  #.##..##.
+        //  ..#.##.#.
+        //  ##......#
+        //  ##......#
+        //  ..#.##.#.
+        //  ..##..##.
+        //  #.#.##.#.
+        //      ><
+        //  012345678
+        //
+        let m = s[0].len();
+        let mut mc = 0;
+        for i in 0..m {
+            let mut j = m - 1;
+            while j > i {
+                let mut s1 = String::new();
+                let mut s2 = String::new();
+                for k in 0..n {
+                    s1.push(s[k].chars().nth(i).unwrap());
+                    s2.push(s[k].chars().nth(j).unwrap());
+                }
+                if s1 == s2 {
+                    mc = std::cmp::max(mc, i);
+                }
+                j -= 1;
+            }
+        }
+
+        let mut check = true;
+
+        let mut i = mc;
+        let mut j = mc + 1;
+
+        while i > 0 && j < n {
+            let mut s1 = String::new();
+            let mut s2 = String::new();
+            for k in 0..n {
+                s1.push(s[k].chars().nth(i).unwrap());
+                if j >= s[k].len() {
+                    break;
+                }
+                s2.push(s[k].chars().nth(j).unwrap());
+            }
+            if s1 != s2 {
+                check = false;
+                break;
+            }
+            i -= 1;
+            j += 1;
+        }
+
+        if check {
+            res += (mc + 1) as u32;
+            continue;
+        }
+
+        // Search by row
+        let mut mc = 0;
+        for i in 0..(n / 2) + 1 {
+            for j in ((n / 2)..n).rev() {
+                if s[i] == s[j] {
+                    mc = std::cmp::max(mc, i);
+                }
+            }
+        }
+
+        let mut check = true;
+
+        let mut i = mc;
+        let mut j = mc + 1;
+
+        while i > 0 && j < n {
+            if s[i] != s[j] {
+                check = false;
+                break;
+            }
+            i -= 1;
+            j += 1;
+        }
+
+        if check {
+            res += (mc + 1) as u32 * 100;
+            continue;
+        }
+    }
+
+    res
+}
+
+// pub fn part2(input: &str) -> u32 {
+//     let mut res: u32 = 0;
+//
+//     res
+// }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 405);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 2331);
+    }
+    //
+    // #[test]
+    // fn example_part2() {
+    //     let input = include_str!("../example.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 2286);
+    // }
+    //
+    // #[test]
+    // fn input_part2() {
+    //     let input = include_str!("../input.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 71585);
+    // }
+}
diff --git a/2023/rust/day15/Cargo.toml b/2023/rust/day15/Cargo.toml
new file mode 100644
index 0000000..f52c8dc
--- /dev/null
+++ b/2023/rust/day15/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day15"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day15/example.txt b/2023/rust/day15/example.txt
new file mode 100644
index 0000000..4f58f74
--- /dev/null
+++ b/2023/rust/day15/example.txt
@@ -0,0 +1 @@
+rn=1,cm-,qp=3,cm=2,qp-,pc=4,ot=9,ab=5,pc-,pc=6,ot=7
diff --git a/2023/rust/day15/input.txt b/2023/rust/day15/input.txt
new file mode 100644
index 0000000..b12bf11
--- /dev/null
+++ b/2023/rust/day15/input.txt
@@ -0,0 +1 @@
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diff --git a/2023/rust/day15/src/lib.rs b/2023/rust/day15/src/lib.rs
new file mode 100644
index 0000000..e9d36eb
--- /dev/null
+++ b/2023/rust/day15/src/lib.rs
@@ -0,0 +1,56 @@
+pub fn part1(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let inputs: Vec<String> = input.trim_end().split(',').map(|x| x.to_string()).collect();
+
+    for i in inputs {
+        let mut s = 0;
+        for ch in i.chars() {
+            s += ch as u32;
+            s *= 17;
+            s %= 256;
+        }
+        res += s;
+    }
+
+    res
+}
+
+pub fn part2(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 1320);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 2331);
+    }
+
+    // #[test]
+    // fn example_part2() {
+    //     let input = include_str!("../example.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 2286);
+    // }
+    //
+    // #[test]
+    // fn input_part2() {
+    //     let input = include_str!("../input.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 71585);
+    // }
+}
diff --git a/2023/rust/day2/Cargo.toml b/2023/rust/day2/Cargo.toml
new file mode 100644
index 0000000..8aa34bb
--- /dev/null
+++ b/2023/rust/day2/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day2"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day2/example.txt b/2023/rust/day2/example.txt
new file mode 100644
index 0000000..295c36d
--- /dev/null
+++ b/2023/rust/day2/example.txt
@@ -0,0 +1,5 @@
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
diff --git a/2023/rust/day2/input.txt b/2023/rust/day2/input.txt
new file mode 100644
index 0000000..249bfe4
--- /dev/null
+++ b/2023/rust/day2/input.txt
@@ -0,0 +1,100 @@
+Game 1: 18 red, 8 green, 7 blue; 15 red, 4 blue, 1 green; 2 green, 17 red, 6 blue; 5 green, 1 blue, 11 red; 18 red, 1 green, 14 blue; 8 blue
+Game 2: 16 blue, 12 green, 3 red; 13 blue, 2 red, 8 green; 15 green, 3 red, 16 blue
+Game 3: 6 green, 15 red; 1 green, 4 red, 7 blue; 9 blue, 7 red, 8 green
+Game 4: 8 red, 2 blue; 11 red, 5 blue, 1 green; 12 red, 1 green, 5 blue; 1 blue; 2 blue, 9 red
+Game 5: 9 blue, 3 red, 12 green; 3 green, 4 red, 17 blue; 15 blue, 2 green, 5 red; 3 blue, 5 green, 6 red; 6 red, 4 blue, 7 green; 3 green, 10 blue
+Game 6: 11 red, 2 blue, 6 green; 2 blue, 9 red, 4 green; 3 blue, 12 red, 8 green; 5 red, 11 green, 4 blue; 2 blue, 9 red, 13 green; 15 red, 3 blue, 7 green
+Game 7: 2 red, 9 green, 12 blue; 14 blue, 1 green, 6 red; 7 blue, 9 green; 9 green, 8 red, 4 blue; 5 red, 3 green, 16 blue; 4 red, 8 green
+Game 8: 11 red, 12 green, 1 blue; 4 red, 7 green; 11 red, 6 green; 17 green; 15 green, 1 red
+Game 9: 1 red, 1 green, 12 blue; 3 green, 12 red, 6 blue; 14 red, 1 blue; 9 blue, 1 red, 3 green
+Game 10: 1 red, 4 blue; 3 blue, 4 green; 3 green, 3 red, 8 blue; 2 blue, 3 red; 3 green, 4 red, 3 blue
+Game 11: 8 blue, 1 red; 8 green, 1 red, 1 blue; 13 green, 9 red, 6 blue
+Game 12: 2 red, 2 blue, 1 green; 3 red, 1 green; 1 blue, 3 green
+Game 13: 12 green, 4 blue; 2 red, 2 blue, 8 green; 6 green, 3 red; 3 red, 5 green; 9 green, 7 blue, 1 red
+Game 14: 1 red, 7 green; 5 green, 12 red, 10 blue; 9 red, 11 blue, 7 green; 7 blue, 3 red, 9 green
+Game 15: 7 green, 1 blue; 1 red, 2 green, 1 blue; 7 green
+Game 16: 1 green, 1 blue; 2 blue, 4 green, 2 red; 2 green, 2 blue
+Game 17: 6 red, 11 green, 7 blue; 1 blue, 13 green, 4 red; 4 green, 6 blue, 7 red
+Game 18: 2 red, 8 blue; 7 red, 11 blue; 1 green, 16 blue, 7 red; 18 blue, 1 green, 14 red
+Game 19: 2 red, 2 blue; 1 green, 6 red; 1 green, 3 red, 2 blue
+Game 20: 6 red, 2 blue, 5 green; 4 red, 1 blue, 9 green; 3 blue, 2 red, 9 green; 8 red, 12 green, 5 blue
+Game 21: 6 red, 7 blue; 3 blue, 16 red, 2 green; 2 blue, 13 red; 3 blue, 11 red, 3 green; 1 green, 18 red, 6 blue; 12 red, 5 blue, 2 green
+Game 22: 9 red, 6 blue, 14 green; 1 blue, 5 green, 13 red; 6 red; 18 red, 4 green; 2 blue, 10 green, 16 red; 1 red, 18 green, 1 blue
+Game 23: 6 green, 4 red, 3 blue; 1 blue, 2 red, 9 green; 5 green, 1 red, 3 blue; 5 blue, 4 red, 4 green
+Game 24: 1 red, 5 green, 2 blue; 4 red, 7 green, 9 blue; 9 blue, 7 green; 7 green, 13 blue; 4 blue, 1 green, 4 red
+Game 25: 13 blue, 10 red, 11 green; 10 green, 1 blue, 3 red; 15 red, 5 green, 8 blue; 19 red, 10 green, 13 blue; 12 blue, 4 green, 16 red; 7 red, 5 green, 9 blue
+Game 26: 20 red, 6 blue, 12 green; 15 blue, 17 red, 9 green; 19 red, 6 green, 3 blue; 8 green, 1 red, 15 blue; 10 green, 8 red, 5 blue; 4 green, 20 red, 18 blue
+Game 27: 2 blue, 3 green, 7 red; 2 blue, 4 red; 5 blue, 5 green; 8 blue, 6 green, 2 red
+Game 28: 1 green, 6 red; 3 red, 3 blue; 1 green, 4 red; 1 red, 2 blue; 2 red
+Game 29: 8 blue, 1 green; 7 blue, 1 red; 6 red, 2 blue; 2 red, 3 green; 3 red, 6 green, 5 blue
+Game 30: 11 blue, 17 green, 10 red; 9 blue, 12 green, 14 red; 16 green, 2 red, 8 blue; 18 green, 1 red, 1 blue; 5 blue, 7 red, 18 green; 9 green, 3 blue, 11 red
+Game 31: 5 blue, 13 green; 2 green, 3 red, 4 blue; 3 red, 15 green, 2 blue; 5 blue, 19 green; 5 blue, 18 green; 3 green, 7 blue, 3 red
+Game 32: 12 red, 2 green, 3 blue; 2 green, 16 red, 1 blue; 13 red, 4 green, 6 blue
+Game 33: 18 green, 8 blue, 3 red; 15 green, 2 blue, 4 red; 14 blue, 3 red, 6 green; 20 green, 13 blue; 1 red, 19 green
+Game 34: 1 green, 7 blue, 2 red; 8 green, 10 blue, 2 red; 3 blue, 1 green, 1 red; 6 green, 13 blue, 1 red; 1 green, 4 blue, 2 red; 1 red, 5 green, 7 blue
+Game 35: 7 blue, 8 red; 2 blue, 3 red; 4 blue, 3 red; 7 red, 4 blue; 1 blue, 1 green, 3 red
+Game 36: 1 red, 8 green; 1 red, 6 green; 3 green, 8 red; 1 blue, 2 red, 1 green
+Game 37: 3 blue, 13 red; 2 blue, 7 red; 5 red, 1 green; 3 red, 3 blue; 1 blue, 12 red, 1 green; 14 red, 3 blue
+Game 38: 7 blue, 18 red, 12 green; 11 red, 6 green, 1 blue; 9 green, 1 red; 9 green, 13 blue, 16 red
+Game 39: 12 red, 3 green, 2 blue; 3 blue, 3 green, 10 red; 2 blue, 5 red; 2 blue, 1 green; 5 blue, 4 green, 7 red; 2 green, 1 red
+Game 40: 1 red, 7 blue, 5 green; 1 red, 4 blue, 8 green; 3 red, 5 blue, 14 green; 10 green, 2 blue, 1 red; 11 blue, 7 green, 1 red; 14 green, 2 blue
+Game 41: 8 green, 5 red, 3 blue; 5 red, 4 blue, 12 green; 10 green, 6 blue; 13 green, 7 blue; 1 red, 2 green, 15 blue
+Game 42: 17 red, 1 blue, 5 green; 9 green, 16 red; 1 blue, 15 green, 2 red; 1 blue, 12 red, 12 green
+Game 43: 12 green, 5 blue; 3 red, 8 blue, 10 green; 8 blue, 2 green, 1 red
+Game 44: 1 green, 7 red, 2 blue; 1 blue, 10 red; 4 green, 3 blue, 19 red; 1 blue, 3 green, 1 red; 1 blue; 4 red, 2 green, 3 blue
+Game 45: 16 red, 12 blue, 1 green; 13 blue, 16 red, 9 green; 7 green, 3 red, 8 blue
+Game 46: 1 red, 17 green, 6 blue; 6 blue, 1 red, 3 green; 12 green, 1 blue; 4 blue, 2 green
+Game 47: 2 green, 12 red, 15 blue; 9 blue, 2 green, 2 red; 3 green, 6 blue, 2 red; 11 blue, 3 green, 5 red; 6 green, 9 red, 17 blue
+Game 48: 5 blue, 6 red; 7 green, 14 red, 4 blue; 2 green, 5 blue, 2 red; 11 blue, 5 red, 5 green
+Game 49: 7 green, 7 blue, 4 red; 11 green, 12 blue, 2 red; 12 blue, 4 red, 9 green; 3 red, 8 blue, 17 green; 16 green, 3 red, 14 blue
+Game 50: 5 green, 4 red, 10 blue; 7 green, 14 red, 5 blue; 12 red, 18 blue, 14 green
+Game 51: 12 green, 3 blue; 10 green, 4 blue, 2 red; 3 green, 5 blue
+Game 52: 12 green, 6 red, 7 blue; 20 green, 6 red, 18 blue; 1 green, 5 blue, 11 red; 2 green, 15 blue, 6 red
+Game 53: 6 red, 2 green, 5 blue; 13 green, 1 blue, 14 red; 7 green, 1 blue; 3 green, 4 blue, 6 red; 10 red, 6 green, 4 blue
+Game 54: 4 blue, 1 red; 1 red, 1 blue, 9 green; 3 red, 2 blue, 4 green; 3 green, 2 red, 5 blue; 9 blue, 2 red, 7 green
+Game 55: 7 blue; 6 blue, 1 red; 4 red, 7 blue; 3 red, 3 blue, 1 green
+Game 56: 2 green, 7 blue; 3 red, 10 blue; 1 green, 2 red; 3 red, 8 blue, 4 green; 1 green, 11 blue, 3 red; 2 green, 8 blue
+Game 57: 3 red, 1 green; 1 green, 1 red, 1 blue; 1 red, 4 green, 15 blue; 9 blue, 2 red, 1 green
+Game 58: 12 blue, 13 red, 5 green; 2 blue, 6 green; 12 red, 15 green, 7 blue; 5 red, 4 green, 14 blue; 15 red, 2 green, 9 blue
+Game 59: 5 green, 5 blue; 4 red, 6 blue, 2 green; 5 blue, 3 green, 6 red; 3 red, 6 green, 4 blue; 3 blue, 7 green, 10 red
+Game 60: 1 red, 1 blue, 3 green; 1 red; 3 green, 6 blue; 6 blue
+Game 61: 7 green, 1 red, 1 blue; 4 red, 3 green, 1 blue; 7 blue, 7 green; 11 blue, 2 green, 5 red; 5 red, 4 green, 5 blue
+Game 62: 17 green, 2 red, 3 blue; 1 red, 3 blue, 2 green; 1 green, 3 blue, 2 red; 1 red, 17 green; 2 red, 15 green, 4 blue; 5 green
+Game 63: 2 green, 4 red, 3 blue; 9 blue, 10 red; 1 green, 13 blue, 2 red; 2 green, 1 blue, 5 red
+Game 64: 6 red, 8 blue; 3 red, 6 blue, 5 green; 13 red, 11 blue, 8 green; 11 red, 3 blue, 1 green
+Game 65: 4 green, 1 blue, 2 red; 3 blue, 3 green, 11 red; 6 green, 3 blue, 3 red; 5 red, 4 blue; 8 red, 5 blue, 2 green
+Game 66: 10 green, 13 red; 1 blue, 2 red, 4 green; 7 red, 7 green; 19 green, 9 red, 1 blue; 16 green, 16 red, 2 blue; 10 red, 11 green
+Game 67: 3 blue, 4 green, 2 red; 6 blue, 19 red; 4 blue, 2 red, 5 green; 4 green, 5 blue, 1 red
+Game 68: 13 blue, 15 red, 7 green; 5 blue, 20 red; 6 green, 12 blue, 8 red; 5 blue, 8 green
+Game 69: 13 red, 13 green; 13 green, 3 red, 1 blue; 8 green; 9 green, 9 red
+Game 70: 8 blue, 11 red, 2 green; 12 red, 2 blue; 13 red, 6 blue, 3 green; 7 blue, 3 green, 5 red; 15 red, 1 blue, 3 green
+Game 71: 7 red, 9 green; 4 blue, 9 green, 7 red; 4 blue, 2 green; 6 blue, 2 red, 9 green
+Game 72: 14 blue, 1 green; 4 red, 1 green, 9 blue; 6 blue, 8 red, 2 green
+Game 73: 17 green; 10 blue, 2 red, 9 green; 1 green, 10 blue, 2 red; 8 blue, 1 red; 5 blue, 16 green
+Game 74: 12 green, 6 red, 5 blue; 2 red, 4 blue, 10 green; 3 green, 4 blue, 2 red; 8 green, 2 red, 5 blue; 5 red, 2 blue, 2 green; 6 green, 1 red, 1 blue
+Game 75: 4 blue, 19 green; 15 blue, 7 green; 18 blue, 5 green, 7 red; 16 green, 15 blue; 7 red, 4 green, 13 blue; 9 green, 13 blue
+Game 76: 1 red, 2 green, 7 blue; 13 blue, 7 green, 1 red; 13 blue, 5 red
+Game 77: 3 red, 10 blue, 6 green; 1 green, 2 red, 10 blue; 7 green, 1 red
+Game 78: 11 green, 2 blue; 6 blue, 8 red, 5 green; 10 red, 6 green, 4 blue; 6 blue, 3 green, 10 red; 5 green, 6 red
+Game 79: 4 red, 6 blue, 1 green; 1 red; 2 green, 3 blue, 4 red; 4 red, 1 green, 2 blue; 2 green, 1 red
+Game 80: 2 red, 1 green; 1 red, 1 green; 7 red, 1 green; 1 blue, 7 red, 3 green
+Game 81: 1 blue, 15 red, 4 green; 2 green, 12 red; 4 green, 13 red; 1 blue, 3 green, 13 red; 12 red, 2 green, 1 blue; 3 green, 8 red, 1 blue
+Game 82: 18 red, 4 green, 1 blue; 14 red, 1 green, 2 blue; 10 red, 2 blue, 7 green; 13 red; 3 red, 7 green, 1 blue; 5 red, 4 green
+Game 83: 4 red, 10 green, 5 blue; 2 red, 12 blue, 13 green; 19 blue, 9 green, 1 red; 2 red, 14 blue, 3 green; 13 green, 8 blue, 5 red
+Game 84: 12 blue, 7 red, 9 green; 1 blue, 1 green, 14 red; 1 green, 8 red, 11 blue; 11 blue, 12 red, 3 green; 11 blue, 8 green, 13 red; 7 green, 7 red, 10 blue
+Game 85: 10 red, 2 blue; 11 green, 9 red, 4 blue; 3 red, 5 blue, 13 green; 5 red, 5 green; 5 red, 2 blue, 4 green; 11 green, 4 blue, 19 red
+Game 86: 1 blue, 6 green, 2 red; 1 red, 1 blue, 8 green; 3 red, 1 blue, 4 green; 1 green, 4 red; 9 green, 2 red; 6 green, 7 red, 1 blue
+Game 87: 8 green, 8 blue, 4 red; 5 red, 2 blue, 10 green; 3 red, 13 green; 1 red, 3 blue, 4 green
+Game 88: 3 blue, 9 green, 3 red; 2 blue, 15 green; 2 red, 9 green
+Game 89: 9 red, 6 green, 15 blue; 10 blue, 7 red, 2 green; 7 green, 16 blue, 4 red
+Game 90: 1 red, 1 blue, 7 green; 7 green, 1 blue, 8 red; 3 red, 1 blue, 1 green
+Game 91: 1 green, 2 red, 6 blue; 4 green, 4 red, 3 blue; 4 red, 11 green, 4 blue; 3 blue, 5 red; 8 green, 2 red, 8 blue
+Game 92: 2 red, 3 blue; 3 blue, 2 green, 2 red; 9 red, 3 green
+Game 93: 2 blue, 5 green; 2 green, 5 blue, 3 red; 2 green, 5 blue, 1 red; 7 blue, 4 red, 9 green
+Game 94: 1 red, 9 blue, 14 green; 6 green; 2 blue, 11 green; 4 blue, 16 green, 1 red
+Game 95: 10 green, 2 blue, 7 red; 4 blue, 4 red, 6 green; 3 red, 2 blue, 3 green
+Game 96: 12 red; 3 green, 10 red; 6 blue, 14 red, 2 green; 7 green, 15 red; 3 green, 3 red, 1 blue; 5 blue, 1 red
+Game 97: 3 red, 1 green, 1 blue; 1 green, 3 red; 4 red, 1 green
+Game 98: 4 red, 5 green, 6 blue; 2 red, 9 green, 6 blue; 2 blue, 11 red, 14 green; 6 green, 4 blue; 11 blue, 11 red, 8 green
+Game 99: 2 green, 20 blue; 12 blue; 3 red, 12 blue; 7 blue; 3 green, 10 blue, 2 red; 3 red, 2 green
+Game 100: 2 blue, 8 green, 12 red; 2 green, 13 red; 2 red, 4 green; 2 green, 7 red; 10 green, 5 red, 1 blue
diff --git a/2023/rust/day2/src/lib.rs b/2023/rust/day2/src/lib.rs
new file mode 100644
index 0000000..e18469c
--- /dev/null
+++ b/2023/rust/day2/src/lib.rs
@@ -0,0 +1,99 @@
+pub fn part1(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    for (i, line) in input.trim_end().split('\n').enumerate() {
+        let game = line.split(": ").collect::<Vec<&str>>()[1];
+        let mut flag = true;
+        for point in game.split(";") {
+            for _play in point.split(',') {
+                let play = _play.trim();
+                let play_s: Vec<_> = play.split(' ').collect();
+                let (p, c) = (play_s[0].parse::<i32>().unwrap(), play_s[1].to_string());
+                if c.chars().nth(0).unwrap() == 'r' && p > 12 {
+                    flag = false;
+                } else if c.chars().nth(0).unwrap() == 'g' && p > 13 {
+                    flag = false;
+                } else if c.chars().nth(0).unwrap() == 'b' && p > 14 {
+                    flag = false;
+                }
+            }
+        }
+
+        if flag {
+            res += (i + 1) as u32;
+        }
+    }
+
+    res
+}
+
+pub fn part2(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    for line in input.trim_end().split('\n') {
+        let game = line.split(": ").collect::<Vec<&str>>()[1];
+        // r, g, b
+        let mut balls: [u32; 3] = [0, 0, 0];
+        for point in game.split(";") {
+            for _play in point.split(',') {
+                let play = _play.trim();
+                let play_s: Vec<_> = play.split(' ').collect();
+                let (p, c) = (play_s[0].parse::<u32>().unwrap(), play_s[1].to_string());
+
+                let bi = match c.chars().nth(0).unwrap() {
+                    'r' => 0,
+                    'g' => 1,
+                    'b' => 2,
+                    _ => panic!("wtf is this color?!"),
+                };
+
+                balls[bi] = if balls[bi] < p { p } else { balls[bi] };
+            }
+        }
+
+        println!("{:?}", balls);
+        let mut tot = 1;
+
+        for j in balls {
+            if j != 0 {
+                tot *= j;
+            }
+        }
+
+        res += tot;
+    }
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 8);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 2331);
+    }
+
+    #[test]
+    fn example_part2() {
+        let input = include_str!("../example.txt");
+        let result = part2(input);
+        assert_eq!(result, 2286);
+    }
+
+    #[test]
+    fn input_part2() {
+        let input = include_str!("../input.txt");
+        let result = part2(input);
+        assert_eq!(result, 71585);
+    }
+}
diff --git a/2023/rust/day3/Cargo.toml b/2023/rust/day3/Cargo.toml
new file mode 100644
index 0000000..898e70d
--- /dev/null
+++ b/2023/rust/day3/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day3"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day3/example.txt b/2023/rust/day3/example.txt
new file mode 100644
index 0000000..b20187f
--- /dev/null
+++ b/2023/rust/day3/example.txt
@@ -0,0 +1,10 @@
+467..114..
+...*......
+..35..633.
+......#...
+617*......
+.....+.58.
+..592.....
+......755.
+...$.*....
+.664.598..
diff --git a/2023/rust/day3/input.txt b/2023/rust/day3/input.txt
new file mode 100644
index 0000000..898bc27
--- /dev/null
+++ b/2023/rust/day3/input.txt
@@ -0,0 +1,140 @@
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diff --git a/2023/rust/day3/src/lib.rs b/2023/rust/day3/src/lib.rs
new file mode 100644
index 0000000..e70b994
--- /dev/null
+++ b/2023/rust/day3/src/lib.rs
@@ -0,0 +1,184 @@
+#[derive(Debug)]
+struct Digit {
+    value: u32,
+    s: usize, // start index
+    f: usize, // start end
+}
+
+#[derive(Debug)]
+struct Symbol {
+    elem: char,
+    i: usize,
+}
+
+fn parse(s: &String, border: &i32) -> (Vec<Digit>, Vec<Symbol>) {
+    let n: i32 = s.len() as i32;
+    let chars = s.chars().rev();
+
+    let mut pos1: i32 = -1;
+    let mut pos2: i32 = -1;
+    let mut incr = 1;
+    let mut digit = 0;
+    let mut symbols: Vec<Symbol> = vec![];
+    let mut digits: Vec<Digit> = vec![];
+    let mut multiples: Vec<usize> = vec![];
+
+    for i in 0..150 {
+        multiples.push(*border as usize * i);
+    }
+
+    for (idx, ch) in chars.enumerate() {
+        if ch.is_digit(10) {
+            if pos2 == -1 {
+                pos2 = n - idx as i32;
+            } else if multiples.contains(&idx) && pos2 != -1 {
+                pos1 = n - idx as i32;
+                digits.push(Digit {
+                    value: digit,
+                    s: pos1 as usize,
+                    f: pos2 as usize,
+                });
+                incr = 1;
+                digit = 0;
+                pos2 = n - idx as i32;
+            }
+            digit += ch.to_digit(10).unwrap() * incr;
+            incr *= 10;
+        }
+
+        if !ch.is_digit(10) {
+            if digit != 0 {
+                pos1 = n - idx as i32;
+                if pos1 == -1 || pos2 == -1 {
+                    panic!("wtf is that?!");
+                }
+                digits.push(Digit {
+                    value: digit,
+                    s: pos1 as usize,
+                    f: pos2 as usize,
+                })
+            }
+            pos2 = -1;
+            incr = 1;
+            digit = 0;
+
+            if ch != '.' {
+                symbols.push(Symbol {
+                    elem: ch,
+                    i: n as usize - idx,
+                })
+            }
+        }
+    }
+    if digit != 0 {
+        pos1 = 0;
+        if pos2 == -1 {
+            panic!("wtf is that?!");
+        }
+        digits.push(Digit {
+            value: digit,
+            s: pos1 as usize,
+            f: pos2 as usize,
+        })
+    }
+
+    digits.reverse();
+    symbols.reverse();
+
+    (digits, symbols)
+}
+
+pub fn part1(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let arr: String = input.split('\n').map(|c| c.chars()).flatten().collect();
+    let border = input.find('\n').unwrap() as i32;
+
+    let (digits, symbols) = parse(&arr, &border);
+
+    let mut valid_s: Vec<usize> = Vec::new();
+    for symbol in &symbols {
+        valid_s.push(symbol.i - 1);
+    }
+
+    for digit in digits {
+        // 13 with border=10
+        // --> 12, 14, 2, 3, 4, 22, 23, 24
+        let mut discover: Vec<usize> = vec![];
+        for i in digit.s..digit.f {
+            let mut js = vec![
+                i as i32 - 1,
+                i as i32 + 1,
+                i as i32 - border - 1,
+                i as i32 - border - 0,
+                i as i32 - border + 1,
+                // i as i32 + border - 1,
+                i as i32 + border - 0,
+                i as i32 + border + 1,
+            ];
+
+            if digit.f as i32 + 1 >= border {
+                js.push(i as i32 + border - 1);
+            }
+
+            for j in js {
+                if j >= 0
+                    && !((digit.s..digit.f).contains(&(j as usize)))
+                    && !(discover.contains(&(j as usize)))
+                {
+                    discover.push(j as usize);
+                }
+            }
+        }
+
+        for d in &discover {
+            if valid_s.contains(&d) {
+                res += digit.value;
+                break;
+            }
+        }
+
+        discover.sort();
+    }
+
+    res
+}
+
+// pub fn part2(input: &str) -> u32 {
+//     let mut res: u32 = 0;
+//
+//     res
+// }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 4361);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 556367);
+    }
+    //
+    // #[test]
+    // fn example_part2() {
+    //     let input = include_str!("../example.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 2286);
+    // }
+    //
+    // #[test]
+    // fn input_part2() {
+    //     let input = include_str!("../input.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 71585);
+    // }
+}
diff --git a/2023/rust/day4/Cargo.toml b/2023/rust/day4/Cargo.toml
new file mode 100644
index 0000000..8842130
--- /dev/null
+++ b/2023/rust/day4/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day4"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day4/example.txt b/2023/rust/day4/example.txt
new file mode 100644
index 0000000..9bdb874
--- /dev/null
+++ b/2023/rust/day4/example.txt
@@ -0,0 +1,6 @@
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+Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11
diff --git a/2023/rust/day4/input.txt b/2023/rust/day4/input.txt
new file mode 100644
index 0000000..93f8c7b
--- /dev/null
+++ b/2023/rust/day4/input.txt
@@ -0,0 +1,203 @@
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diff --git a/2023/rust/day4/src/lib.rs b/2023/rust/day4/src/lib.rs
new file mode 100644
index 0000000..ca38b56
--- /dev/null
+++ b/2023/rust/day4/src/lib.rs
@@ -0,0 +1,132 @@
+fn parse(input: &str) -> Vec<String> {
+    input
+        .trim_end()
+        .split('\n')
+        .map(|x| {
+            let b = x.to_string();
+            let k = b.split(':').last().unwrap();
+
+            return k.trim().to_string();
+        })
+        .collect()
+}
+
+pub fn part1(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let cards: Vec<String> = parse(input);
+    for card in cards {
+        let numbers: Vec<String> = card.split('|').map(|x| x.trim().to_string()).collect();
+        assert_eq!(numbers.len(), 2);
+
+        let nums: Vec<Vec<_>> = numbers
+            .iter()
+            .map(|x| {
+                x.replace("  ", " ")
+                    .split(' ')
+                    .map(|x| x.trim().parse::<u32>().unwrap())
+                    .collect()
+            })
+            .collect();
+
+        assert_eq!(nums.len(), 2);
+        let (winnings, plays) = (&nums[0], &nums[1]);
+
+        let mut k = 0.5;
+        for win in winnings {
+            if plays.contains(&win) {
+                k *= 2.;
+            }
+        }
+        res += k as u32;
+    }
+
+    res
+}
+
+//
+//
+//
+// 1 -> 4 | x
+// 2 -> 2 | y x
+// 3 -> 2 | y y y x
+// 4 -> 1 | y y y y y y y x
+// 5 -> 0 | y y y y y y y y y y y y y x
+// 6 -> 0 | x
+//
+//
+pub fn part2(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let cards: Vec<String> = parse(input);
+    let mut incr: Vec<u32> = Vec::new();
+    incr.resize_with(cards.len(), Default::default);
+
+    let mut i = 0;
+    for card in cards {
+        let numbers: Vec<String> = card.split('|').map(|x| x.trim().to_string()).collect();
+        assert_eq!(numbers.len(), 2);
+
+        let nums: Vec<Vec<_>> = numbers
+            .iter()
+            .map(|x| {
+                x.replace("  ", " ")
+                    .split(' ')
+                    .map(|x| x.trim().parse::<u32>().unwrap())
+                    .collect()
+            })
+            .collect();
+
+        assert_eq!(nums.len(), 2);
+        let (winnings, plays) = (&nums[0], &nums[1]);
+
+        let mut k = 0;
+        for win in winnings {
+            if plays.contains(&win) {
+                k += 1;
+            }
+        }
+
+        for j in (i + 1)..(i + 1 + k) {
+            incr[j] += 1 + incr[i];
+        }
+
+        res += 1 + incr[i];
+        i += 1;
+    }
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 13);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 25174);
+    }
+
+    #[test]
+    fn example_part2() {
+        let input = include_str!("../example.txt");
+        let result = part2(input);
+        assert_eq!(result, 30);
+    }
+
+    #[test]
+    fn input_part2() {
+        let input = include_str!("../input.txt");
+        let result = part2(input);
+        assert_eq!(result, 6420979);
+    }
+}
diff --git a/2023/rust/day5/Cargo.toml b/2023/rust/day5/Cargo.toml
new file mode 100644
index 0000000..f9b62bf
--- /dev/null
+++ b/2023/rust/day5/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day5"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day5/example.txt b/2023/rust/day5/example.txt
new file mode 100644
index 0000000..f756727
--- /dev/null
+++ b/2023/rust/day5/example.txt
@@ -0,0 +1,33 @@
+seeds: 79 14 55 13
+
+seed-to-soil map:
+50 98 2
+52 50 48
+
+soil-to-fertilizer map:
+0 15 37
+37 52 2
+39 0 15
+
+fertilizer-to-water map:
+49 53 8
+0 11 42
+42 0 7
+57 7 4
+
+water-to-light map:
+88 18 7
+18 25 70
+
+light-to-temperature map:
+45 77 23
+81 45 19
+68 64 13
+
+temperature-to-humidity map:
+0 69 1
+1 0 69
+
+humidity-to-location map:
+60 56 37
+56 93 4
diff --git a/2023/rust/day5/input.txt b/2023/rust/day5/input.txt
new file mode 100644
index 0000000..7dfa9ed
--- /dev/null
+++ b/2023/rust/day5/input.txt
@@ -0,0 +1,237 @@
+seeds: 41218238 421491713 1255413673 350530906 944138913 251104806 481818804 233571979 2906248740 266447632 3454130719 50644329 1920342932 127779721 2109326496 538709762 3579244700 267233350 4173137165 60179884
+
+seed-to-soil map:
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+3152606490 2633553947 47505426
+270778478 1814135909 109709019
+1384488117 1361330442 4989471
+2696465635 2383690008 32694366
+
+soil-to-fertilizer map:
+1796371314 958475699 90518367
+4004397333 4049196179 245771117
+2175877891 3813840430 96544159
+1966430612 3997904997 51291182
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+
+fertilizer-to-water map:
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+
+water-to-light map:
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+
+light-to-temperature map:
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+
+temperature-to-humidity map:
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+
+humidity-to-location map:
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diff --git a/2023/rust/day5/src/lib.rs b/2023/rust/day5/src/lib.rs
new file mode 100644
index 0000000..fb3ef96
--- /dev/null
+++ b/2023/rust/day5/src/lib.rs
@@ -0,0 +1,159 @@
+use std::str::Split;
+
+fn get_data(data: &mut Split<&str>) -> Vec<Vec<u64>> {
+    data.nth(0)
+        .unwrap()
+        .split(':')
+        .nth(1)
+        .unwrap()
+        .trim_start()
+        .split('\n')
+        .map(|x| x.split(' ').map(|y| y.parse::<u64>().unwrap()).collect())
+        .collect()
+}
+
+pub fn part1(input: &str) -> u64 {
+    let mut input = input.trim().split("\n\n");
+
+    let mut seeds: Vec<u64> = input
+        .nth(0)
+        .unwrap()
+        .split(':')
+        .nth(1)
+        .unwrap()
+        .trim()
+        .split(' ')
+        .map(|x| x.parse::<u64>().unwrap())
+        .collect();
+
+    let mut data: Vec<Vec<Vec<u64>>> = vec![];
+    for _ in 0..7 {
+        let x: Vec<Vec<u64>> = get_data(&mut input);
+
+        data.push(x);
+    }
+    // 0 -> seed-to-soil
+    // 1 -> soil-to-fertilizer
+    // 2 -> fertilizer-to-water
+    // 3 -> water-to-light
+    // 4 -> light-to-temperature
+    // 5 -> temperature-to-humidity
+    // 6 -> humidity-to-location
+
+    for d in &data {
+        let mut checked: Vec<u64> = vec![];
+        for i in d {
+            let drs = i[0];
+            let srs = i[1];
+            let incr = i[2];
+
+            for seed in &mut seeds {
+                if !checked.contains(&*seed) && *seed >= srs && *seed <= srs + incr {
+                    *seed = *seed - srs + drs;
+                    checked.push(*seed);
+                }
+            }
+        }
+    }
+
+    *seeds.iter().min().unwrap()
+}
+
+pub fn part2(input: &str) -> u64 {
+    let mut input = input.trim().split("\n\n");
+
+    let s: Vec<u64> = input
+        .nth(0)
+        .unwrap()
+        .split(':')
+        .nth(1)
+        .unwrap()
+        .trim()
+        .split(' ')
+        .map(|x| x.parse::<u64>().unwrap())
+        .collect();
+
+    assert_eq!(s.len() % 2, 0);
+    let mut seeds: Vec<u64> = vec![];
+    let mut i = 0;
+    while i < s.len() {
+        for j in s[i] as usize..(s[i] + s[i + 1]) as usize {
+            seeds.push(j as u64);
+        }
+
+        i += 2;
+    }
+    println!("{seeds:?}");
+
+    let mut data: Vec<Vec<Vec<u64>>> = vec![];
+    for _ in 0..7 {
+        let x: Vec<Vec<u64>> = get_data(&mut input);
+
+        data.push(x);
+    }
+    // 0 -> seed-to-soil
+    // 1 -> soil-to-fertilizer
+    // 2 -> fertilizer-to-water
+    // 3 -> water-to-light
+    // 4 -> light-to-temperature
+    // 5 -> temperature-to-humidity
+    // 6 -> humidity-to-location
+
+    for d in &data {
+        let mut checked: Vec<u64> = vec![];
+        for i in d {
+            let drs = i[0];
+            let srs = i[1];
+            let incr = i[2];
+
+            for seed in &mut seeds {
+                if !checked.contains(&*seed) && *seed >= srs && *seed <= srs + incr {
+                    *seed = *seed - srs + drs;
+                    checked.push(*seed);
+                }
+            }
+        }
+    }
+
+    let mut res = seeds[0];
+    for seed in seeds {
+        if seed < res {
+            res = seed;
+        }
+    }
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 35);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 251346198);
+    }
+
+    // #[test]
+    // fn example_part2() {
+    //     let input = include_str!("../example.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 46);
+    // }
+    //
+    // #[test]
+    // fn input_part2() {
+    //     let input = include_str!("../input.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 71585);
+    // }
+}
diff --git a/2023/rust/day6/Cargo.toml b/2023/rust/day6/Cargo.toml
new file mode 100644
index 0000000..89d04ae
--- /dev/null
+++ b/2023/rust/day6/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day6"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day6/example.txt b/2023/rust/day6/example.txt
new file mode 100644
index 0000000..28f5ae9
--- /dev/null
+++ b/2023/rust/day6/example.txt
@@ -0,0 +1,2 @@
+Time:      7  15   30
+Distance:  9  40  200
diff --git a/2023/rust/day6/input.txt b/2023/rust/day6/input.txt
new file mode 100644
index 0000000..f4a8fdc
--- /dev/null
+++ b/2023/rust/day6/input.txt
@@ -0,0 +1,3 @@
+Time:        41     66     72     66
+Distance:   244   1047   1228   1040
+
diff --git a/2023/rust/day6/src/lib.rs b/2023/rust/day6/src/lib.rs
new file mode 100644
index 0000000..b3e33cb
--- /dev/null
+++ b/2023/rust/day6/src/lib.rs
@@ -0,0 +1,102 @@
+pub fn part1(input: &str) -> u64 {
+    let mut res: u64 = 1;
+
+    let td: Vec<Vec<_>> = input
+        .trim_end()
+        .split('\n')
+        .map(|x| {
+            x.split(':')
+                .nth(1)
+                .unwrap()
+                .trim()
+                .replace("    ", " ")
+                .replace("   ", " ")
+                .replace("  ", " ")
+                .split(' ')
+                .map(|y| y.parse::<u64>().unwrap())
+                .collect()
+        })
+        .collect();
+
+    assert_eq!(td.len(), 2);
+    let (t, d) = (&td[0], &td[1]);
+
+    for i in 0..t.len() {
+        let mut r = 0;
+        for j in 0..t[i] {
+            if (t[i] - j) * j > d[i] {
+                r += 1;
+            }
+        }
+        res *= r;
+    }
+
+    res
+}
+
+pub fn part2(input: &str) -> u64 {
+    let mut res: u64 = 1;
+
+    let td: Vec<Vec<_>> = input
+        .trim_end()
+        .split('\n')
+        .map(|x| {
+            x.split(':')
+                .nth(1)
+                .unwrap()
+                .trim()
+                .replace(" ", "")
+                .split(' ')
+                .map(|y| y.parse::<u64>().unwrap())
+                .collect()
+        })
+        .collect();
+
+    assert_eq!(td.len(), 2);
+    let (t, d) = (&td[0], &td[1]);
+
+    for i in 0..t.len() {
+        let mut r = 0;
+        for j in 0..t[i] {
+            if (t[i] - j) * j > d[i] {
+                r += 1;
+            }
+        }
+        res *= r;
+    }
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 288);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 74698);
+    }
+
+    #[test]
+    fn example_part2() {
+        let input = include_str!("../example.txt");
+        let result = part2(input);
+        assert_eq!(result, 71503);
+    }
+
+    #[test]
+    fn input_part2() {
+        let input = include_str!("../input.txt");
+        let result = part2(input);
+        assert_eq!(result, 27563421);
+    }
+}
diff --git a/2023/rust/day7/Cargo.toml b/2023/rust/day7/Cargo.toml
new file mode 100644
index 0000000..b170ccb
--- /dev/null
+++ b/2023/rust/day7/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day7"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day7/example.txt b/2023/rust/day7/example.txt
new file mode 100644
index 0000000..e3500c3
--- /dev/null
+++ b/2023/rust/day7/example.txt
@@ -0,0 +1,5 @@
+32T3K 765
+T55J5 684
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+QQQJA 483
diff --git a/2023/rust/day7/input.txt b/2023/rust/day7/input.txt
new file mode 100644
index 0000000..a39a921
--- /dev/null
+++ b/2023/rust/day7/input.txt
@@ -0,0 +1,1000 @@
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diff --git a/2023/rust/day7/src/lib.rs b/2023/rust/day7/src/lib.rs
new file mode 100644
index 0000000..02cd337
--- /dev/null
+++ b/2023/rust/day7/src/lib.rs
@@ -0,0 +1,153 @@
+use std::{collections::HashMap, str::FromStr};
+
+#[derive(Debug, PartialEq, PartialOrd, Eq, Hash)]
+enum HandType {
+    Five,
+    Four,
+    Full,
+    Three,
+    Two,
+    One,
+    High,
+}
+
+#[derive(Debug)]
+struct Play {
+    hand: Vec<u32>,
+    bid: u32,
+    hand_type: HandType,
+}
+
+#[derive(Debug)]
+struct PlayError;
+
+impl FromStr for Play {
+    type Err = PlayError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if !s.contains(' ') {
+            return Err(PlayError);
+        }
+
+        let s: Vec<String> = s.split(' ').map(|x| x.to_string()).collect();
+        if s.len() != 2 {
+            return Err(PlayError);
+        }
+
+        let mut diffcards: HashMap<char, u32> = HashMap::new();
+        let hand = s[0].chars().collect::<Vec<char>>();
+
+        for ch in &hand {
+            if diffcards.contains_key(&ch) {
+                *(diffcards.get_mut(ch).unwrap()) += 1;
+            } else {
+                diffcards.insert(*ch, 1);
+            }
+        }
+
+        let card_points: HashMap<char, u32> = HashMap::from([
+            ('A', 13),
+            ('K', 12),
+            ('Q', 11),
+            ('J', 10),
+            ('T', 9),
+            ('9', 8),
+            ('8', 7),
+            ('7', 6),
+            ('6', 5),
+            ('5', 4),
+            ('4', 3),
+            ('3', 2),
+            ('2', 1),
+        ]);
+        let hand: Vec<_> = hand.iter().map(|x| *card_points.get(&x).unwrap()).collect();
+
+        let b: Vec<u32> = diffcards.clone().into_values().collect();
+        let max_labels: u32 = *b.iter().max().unwrap();
+
+        let hand_type: HandType = match diffcards.keys().len() {
+            1 => HandType::Five,
+            2 if max_labels == 4 => HandType::Four,
+            2 if max_labels == 3 => HandType::Full,
+            3 if max_labels == 3 => HandType::Three,
+            3 => HandType::Two,
+            4 => HandType::One,
+            5 => HandType::High,
+            _ => panic!("wtf is this?"),
+        };
+
+        Ok(Play {
+            hand,
+            bid: s[1].parse::<u32>().unwrap(),
+            hand_type,
+        })
+    }
+}
+
+pub fn part1(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let plays: Vec<_> = input
+        .trim_end()
+        .split('\n')
+        .map(|x| x.parse::<Play>().unwrap())
+        .collect();
+
+    let mut hs: HashMap<HandType, Vec<Play>> = HashMap::from([
+        (HandType::Five, vec![]),
+        (HandType::Four, vec![]),
+        (HandType::Full, vec![]),
+        (HandType::Three, vec![]),
+        (HandType::Two, vec![]),
+        (HandType::One, vec![]),
+        (HandType::High, vec![]),
+    ]);
+
+    for play in plays {
+        if let Some(p) = hs.get_mut(&play.hand_type) {
+            p.push(play);
+        }
+    }
+
+    let mut rank = 1;
+
+    for kind in [
+        HandType::High,
+        HandType::One,
+        HandType::Two,
+        HandType::Three,
+        HandType::Full,
+        HandType::Four,
+        HandType::Five,
+    ] {
+        hs.get_mut(&kind)
+            .unwrap()
+            .sort_by(|a, b| a.hand.partial_cmp(&b.hand).unwrap());
+
+        for h in hs.get(&kind).unwrap() {
+            res += rank * h.bid;
+            rank += 1;
+        }
+    }
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 6440);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 248179786);
+    }
+}
diff --git a/2023/rust/day7_2/Cargo.toml b/2023/rust/day7_2/Cargo.toml
new file mode 100644
index 0000000..4f1e5ad
--- /dev/null
+++ b/2023/rust/day7_2/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day7_2"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day7_2/example.txt b/2023/rust/day7_2/example.txt
new file mode 100644
index 0000000..e3500c3
--- /dev/null
+++ b/2023/rust/day7_2/example.txt
@@ -0,0 +1,5 @@
+32T3K 765
+T55J5 684
+KK677 28
+KTJJT 220
+QQQJA 483
diff --git a/2023/rust/day7_2/input.txt b/2023/rust/day7_2/input.txt
new file mode 100644
index 0000000..a39a921
--- /dev/null
+++ b/2023/rust/day7_2/input.txt
@@ -0,0 +1,1000 @@
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diff --git a/2023/rust/day7_2/src/lib.rs b/2023/rust/day7_2/src/lib.rs
new file mode 100644
index 0000000..2651e98
--- /dev/null
+++ b/2023/rust/day7_2/src/lib.rs
@@ -0,0 +1,189 @@
+use std::{collections::HashMap, str::FromStr};
+
+#[derive(Debug, PartialEq, PartialOrd, Eq, Hash)]
+enum HandType {
+    Five,
+    Four,
+    Full,
+    Three,
+    Two,
+    One,
+    High,
+}
+
+#[derive(Debug)]
+struct Play {
+    hand: Vec<u32>,
+    bid: u32,
+    hand_type: HandType,
+}
+
+#[derive(Debug)]
+struct PlayError;
+
+impl FromStr for Play {
+    type Err = PlayError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if !s.contains(' ') {
+            return Err(PlayError);
+        }
+
+        let s: Vec<String> = s.split(' ').map(|x| x.to_string()).collect();
+        if s.len() != 2 {
+            return Err(PlayError);
+        }
+
+        let mut diffcards: HashMap<char, u32> = HashMap::new();
+        let hand = s[0].chars().collect::<Vec<char>>();
+
+        for ch in &hand {
+            if diffcards.contains_key(&ch) {
+                *(diffcards.get_mut(ch).unwrap()) += 1;
+            } else {
+                diffcards.insert(*ch, 1);
+            }
+        }
+
+        let card_points: HashMap<char, u32> = HashMap::from([
+            ('A', 13),
+            ('K', 12),
+            ('Q', 11),
+            ('T', 9),
+            ('9', 8),
+            ('8', 7),
+            ('7', 6),
+            ('6', 5),
+            ('5', 4),
+            ('4', 3),
+            ('3', 2),
+            ('2', 1),
+            ('J', 0),
+        ]);
+        let hand: Vec<_> = hand.iter().map(|x| *card_points.get(&x).unwrap()).collect();
+        let jokers = hand.iter().filter(|&n| *n == 0).count();
+        let b: Vec<u32> = diffcards.clone().into_values().collect();
+        let max_labels: u32 = *b.iter().max().unwrap();
+
+        let mut hand_type: HandType = match diffcards.keys().len() {
+            1 => HandType::Five,
+            2 if max_labels == 4 => HandType::Four,
+            2 if max_labels == 3 => HandType::Full,
+            3 if max_labels == 3 => HandType::Three,
+            3 => HandType::Two,
+            4 => HandType::One,
+            5 => HandType::High,
+            _ => panic!("wtf is this?"),
+        };
+
+        match jokers {
+            1 => {
+                hand_type = match hand_type {
+                    HandType::High => HandType::One,
+                    HandType::One => HandType::Three,
+                    HandType::Two => HandType::Full,
+                    HandType::Three => HandType::Four,
+                    HandType::Four => HandType::Five,
+                    _ => panic!("wtf is this?"),
+                }
+            }
+            2 => {
+                hand_type = match hand_type {
+                    HandType::One => HandType::Three,
+                    HandType::Two => HandType::Four,
+                    HandType::Full => HandType::Five,
+                    _ => panic!("wtf is this?"),
+                }
+            }
+            3 => {
+                hand_type = match hand_type {
+                    HandType::High => HandType::Three,
+                    HandType::One => HandType::Four,
+                    HandType::Two => HandType::Five,
+                    HandType::Three => HandType::Four,
+                    HandType::Full => HandType::Five,
+                    _ => panic!("wtf is this?"),
+                }
+            }
+            4 => {
+                hand_type = HandType::Five;
+            }
+            0 | 5 => {}
+            _ => panic!("wtf is this?"),
+        };
+
+        Ok(Play {
+            hand,
+            bid: s[1].parse::<u32>().unwrap(),
+            hand_type,
+        })
+    }
+}
+
+pub fn part2(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let plays: Vec<_> = input
+        .trim_end()
+        .split('\n')
+        .map(|x| x.parse::<Play>().unwrap())
+        .collect();
+
+    let mut hs: HashMap<HandType, Vec<Play>> = HashMap::from([
+        (HandType::Five, vec![]),
+        (HandType::Four, vec![]),
+        (HandType::Full, vec![]),
+        (HandType::Three, vec![]),
+        (HandType::Two, vec![]),
+        (HandType::One, vec![]),
+        (HandType::High, vec![]),
+    ]);
+
+    for play in plays {
+        if let Some(p) = hs.get_mut(&play.hand_type) {
+            p.push(play);
+        }
+    }
+
+    let mut rank = 1;
+
+    for kind in [
+        HandType::High,
+        HandType::One,
+        HandType::Two,
+        HandType::Three,
+        HandType::Full,
+        HandType::Four,
+        HandType::Five,
+    ] {
+        hs.get_mut(&kind)
+            .unwrap()
+            .sort_by(|a, b| a.hand.partial_cmp(&b.hand).unwrap());
+
+        for h in hs.get(&kind).unwrap() {
+            res += rank * h.bid;
+            rank += 1;
+        }
+    }
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part2() {
+        let input = include_str!("../example.txt");
+        let result = part2(input);
+        assert_eq!(result, 5905);
+    }
+
+    #[test]
+    fn input_part2() {
+        let input = include_str!("../input.txt");
+        let result = part2(input);
+        assert_eq!(result, 247885995);
+    }
+}
diff --git a/2023/rust/day8/Cargo.toml b/2023/rust/day8/Cargo.toml
new file mode 100644
index 0000000..4879259
--- /dev/null
+++ b/2023/rust/day8/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day8"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day8/example.txt b/2023/rust/day8/example.txt
new file mode 100644
index 0000000..9029a1b
--- /dev/null
+++ b/2023/rust/day8/example.txt
@@ -0,0 +1,9 @@
+RL
+
+AAA = (BBB, CCC)
+BBB = (DDD, EEE)
+CCC = (ZZZ, GGG)
+DDD = (DDD, DDD)
+EEE = (EEE, EEE)
+GGG = (GGG, GGG)
+ZZZ = (ZZZ, ZZZ)
diff --git a/2023/rust/day8/example2.txt b/2023/rust/day8/example2.txt
new file mode 100644
index 0000000..5b3fa58
--- /dev/null
+++ b/2023/rust/day8/example2.txt
@@ -0,0 +1,10 @@
+LR
+
+11A = (11B, XXX)
+11B = (XXX, 11Z)
+11Z = (11B, XXX)
+22A = (22B, XXX)
+22B = (22C, 22C)
+22C = (22Z, 22Z)
+22Z = (22B, 22B)
+XXX = (XXX, XXX)
diff --git a/2023/rust/day8/input.txt b/2023/rust/day8/input.txt
new file mode 100644
index 0000000..ac178d0
--- /dev/null
+++ b/2023/rust/day8/input.txt
@@ -0,0 +1,796 @@
+LRRLRLRRRLLRLRRRLRLLRLRLRRLRLRRLRRLRLRLLRRRLRRLLRRRLRRLRRRLRRLRLRLLRRLRLRRLLRRRLLLRRRLLLRRLRLRRLRLLRRRLRRLRRRLRRLLRRRLRRRLRRRLRLRRLRLRRRLRRRLRRLRLRRLLRRRLRRLLRRLRRLRLRLRRRLRLLRRRLRRLRRRLLRRLLLLLRRRLRRLLLRRRLRRRLRRLRLLLLLRLRRRLRRRLRLRRLLLLRLRRRLLRRRLRRRLRLRLRRLRRLRRLRLRLLLRLRRLRRLRRRLRRRLLRRRR
+
+RBX = (TMF, KTP)
+RBP = (MKS, MKS)
+CGR = (XDR, VDX)
+KBX = (DGP, JKM)
+BNJ = (NJC, QRL)
+BXQ = (DKX, CJQ)
+NDX = (PHJ, TRQ)
+KFQ = (KXN, GBQ)
+LRF = (CTS, MTT)
+RTN = (VMK, JTK)
+QKP = (FDS, SFG)
+BVB = (BHS, VRQ)
+NBT = (BPJ, DFF)
+HQM = (QMV, XVG)
+XMR = (RKH, NJQ)
+PHC = (XHP, DKM)
+HTX = (BXK, BQP)
+TPJ = (TNQ, QDX)
+RDJ = (KHB, MFG)
+XTF = (PPR, FHG)
+DVA = (DBM, MVD)
+HFP = (CXV, VCD)
+HPS = (GTD, NBL)
+LBK = (FVN, LHX)
+KKS = (FKM, LHN)
+FJV = (LVN, PLP)
+MLH = (SFR, RJK)
+SVQ = (RCS, FFD)
+PTB = (TMC, QCR)
+RFL = (RXP, VRL)
+PTH = (XTS, GFG)
+QNM = (TJR, MHX)
+BJT = (PJG, SHG)
+JJD = (FMJ, QVV)
+GMX = (CLD, QRM)
+DGZ = (BSL, BRS)
+BVM = (SFC, JGD)
+GNQ = (PLP, LVN)
+XPG = (VLH, BCM)
+PND = (RXV, VGM)
+RNV = (GVL, MTB)
+JSG = (QVP, XCX)
+QHP = (KQG, BML)
+XBK = (NPP, CRN)
+QRL = (RQH, BGH)
+HDJ = (VRQ, BHS)
+XPD = (HSB, LRC)
+KJK = (XCV, MDG)
+NJB = (RKL, SHQ)
+MCQ = (XFT, MRQ)
+QRC = (XVS, CSN)
+FCT = (DFF, BPJ)
+MTF = (PQT, CNQ)
+RXG = (QVP, XCX)
+MVZ = (QRC, GHJ)
+RKL = (QQM, BFT)
+VRT = (GMJ, BDK)
+BNS = (HQV, HPS)
+JSQ = (HTC, PGD)
+BHB = (VGQ, BTM)
+NLP = (RKB, XQB)
+FGF = (CVK, VRT)
+FPM = (GDS, LTG)
+BCX = (NDX, GSL)
+GVL = (VCX, PSP)
+KRM = (MHK, JCX)
+GLJ = (XNX, RKP)
+LBV = (FDC, TPJ)
+GSP = (KMC, LQR)
+TFR = (HXJ, MFJ)
+DLX = (FNK, GLJ)
+DKX = (XSR, LHP)
+SVR = (KPX, QTM)
+JMT = (GXV, RTX)
+XSX = (HHD, HHD)
+RJF = (BRH, HGP)
+BDK = (TGX, HKP)
+TFF = (DSX, DSX)
+TJR = (BKB, LCB)
+BDQ = (CLD, QRM)
+NTC = (BQL, BQL)
+CVS = (RQC, FFV)
+BML = (VNT, JRH)
+CBK = (TGB, RTN)
+HQV = (GTD, NBL)
+PDT = (SRQ, MLD)
+RXV = (KJK, FCD)
+XTS = (SCG, KQJ)
+PXG = (LKG, MTQ)
+PCX = (FKJ, FCV)
+HKR = (LMK, BJR)
+CKK = (XSX, XSX)
+TNP = (TDH, JPR)
+PCH = (RBP, PQH)
+KHB = (RQR, BXQ)
+CJZ = (CNC, HJX)
+JPN = (FRP, QTB)
+RKP = (NKH, FQC)
+BDP = (GCM, VKT)
+HQX = (TQF, NJB)
+PFV = (FPM, VNP)
+NFQ = (GFX, GXH)
+STX = (MCQ, DNS)
+CKX = (CFS, BNS)
+NRJ = (SBG, TLK)
+DHS = (VBH, VMT)
+TVL = (BPQ, NBM)
+QTF = (MPS, RJB)
+FHV = (LMK, BJR)
+JCV = (JSQ, STQ)
+RGX = (GVL, MTB)
+CTS = (PCB, GJV)
+RCS = (TNT, XTF)
+PCS = (NJH, RLX)
+KNG = (CHP, FNN)
+FJL = (KKH, QGQ)
+CPK = (KTX, CGR)
+BLF = (PCQ, TKN)
+FCR = (STF, SVQ)
+BSL = (GFJ, CDL)
+FKS = (GRG, JSB)
+FCM = (LFX, RJF)
+XLK = (CDP, CBD)
+KNB = (VGQ, BTM)
+KGC = (TJR, MHX)
+JHM = (JSP, XDN)
+HFN = (STF, SVQ)
+GCM = (CKX, KPS)
+CGV = (MHK, JCX)
+TQP = (JRM, XSB)
+GSM = (FJV, GNQ)
+KBL = (DLX, BGD)
+CBC = (MQK, RRF)
+NJM = (KLQ, BVL)
+THG = (CPG, PND)
+DXP = (HDJ, BVB)
+DTT = (XDN, JSP)
+PLP = (BKF, FGP)
+MSZ = (MVD, DBM)
+BQC = (NPL, VXF)
+CGB = (LRM, MTH)
+RLX = (DBT, RJN)
+RXP = (HFP, JNS)
+TTH = (QNF, KNG)
+LHS = (QFR, GTN)
+NBL = (THT, VTQ)
+DRS = (PJH, STX)
+PSP = (CPK, QKF)
+PPR = (LQK, VSN)
+QHT = (RLG, TDG)
+FVM = (MLR, HXF)
+DHB = (CQC, BKK)
+MVP = (GHJ, QRC)
+TDG = (RVX, CDB)
+LKN = (HXF, MLR)
+CNR = (KCV, CDR)
+SMC = (BBR, BMS)
+QDP = (LXV, VPS)
+LLD = (CGC, NGQ)
+KXN = (PRR, PSR)
+LRC = (SHB, PBK)
+SQD = (LBV, CRP)
+QTB = (KNS, JTS)
+MTT = (GJV, PCB)
+GMV = (JNH, MJF)
+DTG = (SQD, KVV)
+RTV = (DSB, SJB)
+CDL = (FTQ, CPN)
+JHR = (JRM, XSB)
+BFP = (PFG, MTD)
+DTB = (NDX, GSL)
+SQM = (CXL, NBD)
+NBP = (KBN, LQH)
+BTC = (LJT, TCV)
+PQT = (PXG, BSF)
+QDH = (FPM, VNP)
+VPT = (PRT, VHJ)
+VKC = (GXK, QSB)
+NXB = (QKP, TGK)
+FDF = (VRT, CVK)
+NTG = (FRV, BQR)
+RKB = (PHC, JSD)
+MHV = (XXL, THG)
+PHV = (SNM, TFR)
+XRK = (JNN, LKR)
+XVS = (CBK, NNM)
+GDQ = (BDQ, GMX)
+TKR = (CKJ, LVQ)
+XCX = (LSP, FNB)
+JCX = (FGF, FDF)
+MFJ = (DBB, HBH)
+BQP = (HRT, DQD)
+VNC = (BDQ, GMX)
+SSC = (LQH, KBN)
+TJD = (QFV, KRS)
+NKL = (CKK, DDC)
+NTM = (QHG, MCC)
+JBQ = (HXV, JPN)
+DGP = (FVM, LKN)
+SJB = (LRQ, DMG)
+LJT = (MMT, MDL)
+RFC = (MVM, JXP)
+FFV = (TPG, QMD)
+PJH = (DNS, MCQ)
+VCD = (FHV, HKR)
+MPS = (DHH, LPT)
+VHJ = (RGX, RNV)
+FLT = (FRF, NHG)
+DSF = (SDV, VKC)
+HJQ = (CDR, KCV)
+BQR = (PDX, PMX)
+CRJ = (BPN, KKS)
+MQN = (PNN, DHB)
+KCC = (KMC, LQR)
+BTH = (VLH, BCM)
+KNS = (GGM, SJS)
+SCG = (MBF, RDR)
+VDQ = (JNN, LKR)
+XFT = (VPT, FLH)
+RDR = (GTF, GJR)
+CXS = (RRF, MQK)
+XDN = (SSF, VGC)
+JPR = (VGX, TCF)
+BTF = (LKM, GBG)
+GCJ = (VPS, LXV)
+FGJ = (XVG, QMV)
+MBF = (GJR, GTF)
+TPG = (TND, QSF)
+BNR = (BHG, SMC)
+GJV = (FLB, PCX)
+LQF = (BJT, KTN)
+VSB = (JVB, FVK)
+NHB = (HQX, LLQ)
+CKC = (PJD, TRS)
+JVB = (QQV, NRS)
+BKK = (LSR, LJN)
+SBV = (GTN, QFR)
+JMK = (MFG, KHB)
+LPX = (NBP, SSC)
+KLJ = (CDX, VTL)
+KQJ = (RDR, MBF)
+VMK = (JXJ, BMT)
+TRS = (LQM, JJD)
+KCM = (XBD, XMH)
+JCT = (NFQ, NDJ)
+FGM = (HMK, PGQ)
+QKK = (RLS, LPX)
+QJD = (PDT, RPQ)
+LHP = (PLN, MQN)
+NPL = (TFF, TFF)
+XHP = (PJQ, KBL)
+HMK = (JNV, XPS)
+KMC = (VCG, NTG)
+QDX = (TMM, HHM)
+VNP = (LTG, GDS)
+PDR = (CDX, VTL)
+HVK = (BQC, SCN)
+QMV = (BNJ, CRL)
+DDR = (KRS, QFV)
+RDG = (QHP, QXN)
+CRL = (NJC, QRL)
+SHB = (SQX, JVV)
+TSP = (BPX, FVC)
+RRF = (KJB, PTB)
+CSG = (FRX, RTP)
+RPQ = (SRQ, MLD)
+VXS = (MTN, DJQ)
+PJK = (NGD, NTM)
+QHG = (NXT, DHS)
+LSP = (MTR, GGH)
+SHN = (JJS, RVC)
+TNQ = (TMM, HHM)
+NPK = (GCM, VKT)
+MJF = (NBT, FCT)
+JNN = (PTH, HFK)
+NRS = (CLT, HGV)
+HSX = (BPX, FVC)
+MVM = (DSF, NQS)
+PBK = (SQX, JVV)
+HHD = (DBM, MVD)
+MTD = (DVB, BTX)
+PXP = (NPP, CRN)
+TMF = (LPF, QPD)
+BRT = (FJV, GNQ)
+MFQ = (BHG, SMC)
+DJQ = (MVP, MVZ)
+LKR = (PTH, HFK)
+STQ = (HTC, PGD)
+DXF = (JBX, TRT)
+RJN = (PDR, KLJ)
+CGC = (KKL, RJV)
+SRG = (QKK, LND)
+MCC = (DHS, NXT)
+JMG = (RLX, NJH)
+NKH = (DGF, FJL)
+JXP = (DSF, NQS)
+GXX = (CKC, MFL)
+MXD = (KBC, FGK)
+SCH = (XPG, BTH)
+XSR = (MQN, PLN)
+KKD = (NBD, CXL)
+CLJ = (GCN, GCN)
+QVV = (THK, LQV)
+VLH = (FFB, STD)
+RTP = (CBC, CXS)
+RVX = (BLF, PTM)
+KBN = (JNF, BTC)
+PFX = (JHM, DTT)
+NVL = (KCM, DLK)
+QRM = (CQK, RBB)
+HKP = (SHN, TMV)
+VXF = (TFF, JRP)
+LDL = (LHM, JMT)
+BQL = (DRS, VQQ)
+FDC = (TNQ, QDX)
+MMT = (MSL, JCT)
+CXV = (HKR, FHV)
+BKB = (FCM, QTC)
+HRQ = (RXG, JSG)
+RKH = (JFF, TKR)
+VQR = (JGD, SFC)
+KCV = (LNG, NCV)
+XSB = (DTG, DFK)
+JGD = (HLP, FNS)
+VCK = (RXP, VRL)
+GTN = (BCP, CKB)
+QDK = (CBD, CDP)
+SNF = (JNH, MJF)
+FVK = (QQV, NRS)
+HHM = (VXK, PJK)
+JRM = (DTG, DFK)
+QPL = (XLK, QDK)
+SCV = (QHP, QXN)
+RQC = (QMD, TPG)
+LFX = (BRH, HGP)
+FRX = (CXS, CBC)
+BTM = (FPK, JVF)
+BPN = (LHN, FKM)
+LRQ = (LSQ, PMP)
+TPV = (LQF, KDN)
+XBN = (QDS, DXP)
+RBB = (FCR, HFN)
+XSM = (LNT, STB)
+SBR = (PQT, CNQ)
+LVM = (SBV, LHS)
+KBC = (JHR, TQP)
+DLJ = (FGK, KBC)
+LKG = (VJX, HLQ)
+NXT = (VMT, VBH)
+CBD = (HGN, HBG)
+BHS = (VTF, MRV)
+BTP = (GBG, LKM)
+DSM = (CKK, CKK)
+LSR = (CMB, NLP)
+NPP = (BCX, DTB)
+XCV = (SMS, QJD)
+PNM = (BPQ, NBM)
+VPS = (JJB, XMR)
+JNH = (FCT, NBT)
+KTN = (SHG, PJG)
+FMJ = (LQV, THK)
+GFX = (NBB, NBB)
+SRQ = (GNS, QGB)
+FQC = (DGF, FJL)
+MPA = (BRS, BSL)
+BMS = (FKS, SKF)
+BMT = (JMG, PCS)
+QFV = (SCH, FDJ)
+STF = (RCS, FFD)
+JTS = (GGM, SJS)
+NJQ = (TKR, JFF)
+MTQ = (HLQ, VJX)
+FGK = (TQP, JHR)
+JNF = (TCV, LJT)
+LKM = (KGC, QNM)
+MXV = (BQP, BXK)
+FRF = (LVM, HGK)
+GGH = (BHB, KNB)
+BGH = (KBX, FDN)
+LQH = (JNF, BTC)
+JVF = (LDS, DCD)
+CLT = (QPL, LFV)
+HRV = (TRD, RXH)
+NBD = (PXP, XBK)
+PJD = (JJD, LQM)
+XMV = (BBF, LKX)
+BCN = (PBH, HPL)
+XMH = (JNG, GCX)
+HFK = (GFG, XTS)
+VTL = (RFC, VPF)
+MSL = (NFQ, NDJ)
+THH = (KNG, QNF)
+PCB = (PCX, FLB)
+GBQ = (PRR, PSR)
+NMS = (BQC, SCN)
+PDX = (BGP, SFH)
+LDS = (TLJ, LLD)
+HGV = (QPL, LFV)
+LMK = (VKX, JCV)
+NBM = (PKR, QCS)
+NLR = (LKJ, DGZ)
+QDN = (TRT, JBX)
+MTH = (HMT, NJM)
+CKF = (LKJ, LKJ)
+FDN = (DGP, JKM)
+CDR = (NCV, LNG)
+SGJ = (GBQ, KXN)
+TMM = (VXK, PJK)
+JSL = (CTS, MTT)
+QGB = (TBK, NHB)
+TDA = (GHJ, QRC)
+GTF = (QDP, GCJ)
+TCG = (FVK, JVB)
+LXJ = (FVN, LHX)
+TQF = (RKL, SHQ)
+ZZZ = (VQQ, DRS)
+NCV = (CRJ, GBL)
+BKF = (CJP, PRL)
+QPD = (DQN, JBQ)
+MFL = (PJD, TRS)
+NHG = (HGK, LVM)
+MRV = (MLH, TBV)
+XHS = (PSN, HRQ)
+JJB = (NJQ, RKH)
+TGK = (SFG, FDS)
+CGS = (TRD, RXH)
+GCN = (NCN, CVS)
+PNN = (BKK, CQC)
+LSQ = (KCC, GSP)
+LND = (RLS, LPX)
+CPG = (VGM, RXV)
+GSF = (HMJ, RMH)
+JRH = (VQR, BVM)
+FJB = (DTT, JHM)
+FKM = (BFK, XCQ)
+LPT = (PRD, CGB)
+XVG = (CRL, BNJ)
+KRS = (FDJ, SCH)
+BNL = (BQL, ZZZ)
+JMB = (XVD, MBH)
+KKH = (RLN, PHV)
+MTB = (PSP, VCX)
+NCN = (FFV, RQC)
+FVC = (QJC, SRG)
+FTS = (THG, XXL)
+SFG = (BCN, DBN)
+RXH = (XQT, SDR)
+MLR = (GDQ, VNC)
+TRD = (XQT, SDR)
+BGD = (GLJ, FNK)
+XDJ = (MPS, RJB)
+JMJ = (MDJ, RTV)
+RVC = (PXQ, NRJ)
+QQV = (CLT, HGV)
+MLD = (QGB, GNS)
+KPH = (HRQ, PSN)
+RLN = (TFR, SNM)
+JRP = (DSX, HPD)
+SJS = (DSM, NKL)
+PGD = (CGS, HRV)
+HPL = (GKH, CVN)
+MQK = (PTB, KJB)
+QCR = (MHV, FTS)
+VCG = (BQR, FRV)
+LXV = (XMR, JJB)
+PKR = (QSH, XMV)
+JSB = (DLJ, MXD)
+VRL = (JNS, HFP)
+PHJ = (BTF, BTP)
+CXL = (XBK, PXP)
+FNN = (TSP, HSX)
+XQT = (VHH, QHT)
+LQV = (DQK, JMB)
+RLS = (NBP, SSC)
+TCV = (MDL, MMT)
+QTC = (LFX, RJF)
+LRK = (MFL, CKC)
+MHK = (FGF, FDF)
+RLJ = (HJX, CNC)
+TLK = (RFL, VCK)
+CNC = (HJQ, CNR)
+LQL = (FRX, RTP)
+QQM = (MFQ, BNR)
+VBH = (HLB, JMJ)
+GKX = (TGK, QKP)
+KQG = (JRH, VNT)
+XDR = (DNF, KJV)
+GMJ = (HKP, TGX)
+VRQ = (VTF, MRV)
+HGP = (VNB, LDL)
+LNG = (GBL, CRJ)
+BSF = (LKG, MTQ)
+BRH = (VNB, LDL)
+PJQ = (BGD, DLX)
+QKF = (CGR, KTX)
+QMD = (TND, QSF)
+PQH = (MKS, STP)
+FRV = (PDX, PMX)
+LPF = (JBQ, DQN)
+CQM = (TDH, JPR)
+HJX = (CNR, HJQ)
+AAA = (DRS, VQQ)
+TDH = (VGX, TCF)
+TGX = (TMV, SHN)
+BDH = (XFV, GSF)
+GXK = (BFP, TFH)
+BFT = (MFQ, BNR)
+NGD = (QHG, MCC)
+FPK = (DCD, LDS)
+MTR = (KNB, BHB)
+SNM = (MFJ, HXJ)
+HLP = (RHQ, SVR)
+JSP = (VGC, SSF)
+NJH = (RJN, DBT)
+SKF = (GRG, JSB)
+PTM = (TKN, PCQ)
+QGQ = (PHV, RLN)
+SSF = (NVL, JPB)
+PCQ = (LTC, PCH)
+KJV = (GMS, XGF)
+JSD = (XHP, DKM)
+RRB = (LQF, KDN)
+GJJ = (FLT, BNV)
+FJA = (HJX, CNC)
+HLQ = (XRK, VDQ)
+KTP = (LPF, QPD)
+PRD = (LRM, MTH)
+QNF = (CHP, FNN)
+DQK = (MBH, XVD)
+TMS = (CLJ, XML)
+QVP = (FNB, LSP)
+BPX = (QJC, SRG)
+QXN = (KQG, BML)
+VGQ = (JVF, FPK)
+BRS = (CDL, GFJ)
+NQS = (VKC, SDV)
+LFV = (XLK, QDK)
+SMS = (RPQ, PDT)
+BBF = (CGV, KRM)
+VMT = (HLB, JMJ)
+QSF = (JSL, LRF)
+CJQ = (XSR, LHP)
+RDF = (KKD, SQM)
+MKS = (CKF, CKF)
+STD = (MNM, TMS)
+DNS = (MRQ, XFT)
+MFG = (RQR, BXQ)
+GBG = (QNM, KGC)
+JNG = (RDG, SCV)
+CVN = (GJJ, QVC)
+HMT = (BVL, KLQ)
+VTQ = (NTC, BNL)
+TGB = (JTK, VMK)
+PSR = (NPK, BDP)
+MDJ = (DSB, SJB)
+CKB = (VSB, TCG)
+DNF = (GMS, XGF)
+LQK = (XFR, RDF)
+RHQ = (KPX, QTM)
+VKX = (STQ, JSQ)
+BRX = (DDR, TJD)
+LJN = (NLP, CMB)
+DJR = (HMK, PGQ)
+VNB = (JMT, LHM)
+DBM = (SBR, MTF)
+KLQ = (XBN, MNH)
+MDL = (MSL, JCT)
+SQX = (TPV, RRB)
+CLD = (CQK, RBB)
+HPD = (RLJ, CJZ)
+LHN = (BFK, XCQ)
+KJB = (TMC, QCR)
+RLG = (RVX, CDB)
+PBH = (GKH, CVN)
+DMB = (HHD, MSZ)
+SDV = (GXK, QSB)
+KPX = (XDJ, QTF)
+NBB = (MTN, MTN)
+BTX = (BRT, GSM)
+HGN = (HJT, RBX)
+GDS = (XSM, BGG)
+KDN = (KTN, BJT)
+GSL = (TRQ, PHJ)
+SFR = (XHS, KPH)
+JNV = (TVL, PNM)
+JNS = (VCD, CXV)
+LHM = (GXV, RTX)
+TFH = (MTD, PFG)
+GHJ = (CSN, XVS)
+KNQ = (LRK, GXX)
+PRT = (RNV, RGX)
+JTK = (BMT, JXJ)
+MRQ = (VPT, FLH)
+TKN = (LTC, PCH)
+VSN = (XFR, RDF)
+HXJ = (DBB, HBH)
+PRL = (THH, TTH)
+GCX = (RDG, SCV)
+MNH = (DXP, QDS)
+CMB = (XQB, RKB)
+CHP = (TSP, HSX)
+BCP = (TCG, VSB)
+LNT = (HQM, FGJ)
+FNK = (XNX, RKP)
+HRT = (FJB, PFX)
+HTC = (CGS, HRV)
+SDR = (QHT, VHH)
+CQK = (FCR, HFN)
+LVN = (FGP, BKF)
+FDS = (DBN, BCN)
+QCS = (QSH, XMV)
+TRT = (KFQ, SGJ)
+RQH = (FDN, KBX)
+QJC = (QKK, LND)
+MVD = (SBR, MTF)
+SBG = (RFL, VCK)
+DSX = (RLJ, RLJ)
+JBX = (KFQ, SGJ)
+JVV = (RRB, TPV)
+BBR = (FKS, SKF)
+KTX = (VDX, XDR)
+CSN = (NNM, CBK)
+NNM = (RTN, TGB)
+VXK = (NGD, NTM)
+DQD = (FJB, PFX)
+CDB = (BLF, PTM)
+GBL = (BPN, KKS)
+BGP = (SNT, BRX)
+CRP = (FDC, TPJ)
+DFK = (KVV, SQD)
+LVQ = (KNQ, FBX)
+HSB = (PBK, SHB)
+PJG = (TNP, CQM)
+JPB = (KCM, DLK)
+JJS = (PXQ, NRJ)
+XGF = (QDH, PFV)
+DKM = (KBL, PJQ)
+DVB = (GSM, BRT)
+TMC = (MHV, FTS)
+TRQ = (BTP, BTF)
+FLB = (FCV, FKJ)
+BVL = (MNH, XBN)
+XPA = (NCN, CVS)
+XPS = (PNM, TVL)
+CPN = (RDJ, JMK)
+RQR = (DKX, CJQ)
+SFH = (SNT, BRX)
+DBT = (KLJ, PDR)
+MBH = (XCS, XPD)
+DLK = (XMH, XBD)
+HBG = (HJT, RBX)
+THK = (DQK, JMB)
+DGF = (KKH, QGQ)
+BPJ = (GKX, NXB)
+MTN = (MVP, MVP)
+TMV = (RVC, JJS)
+GMS = (PFV, QDH)
+FDJ = (BTH, XPG)
+FFB = (MNM, MNM)
+RTX = (LBK, LXJ)
+BGG = (LNT, STB)
+LRM = (HMT, NJM)
+XVD = (XPD, XCS)
+THT = (NTC, NTC)
+GXH = (NBB, VXS)
+LTG = (XSM, BGG)
+GKH = (GJJ, QVC)
+TNT = (FHG, PPR)
+CDP = (HGN, HBG)
+DQN = (HXV, JPN)
+FNS = (SVR, RHQ)
+DSB = (DMG, LRQ)
+DCD = (TLJ, LLD)
+FTQ = (JMK, RDJ)
+VGX = (SFN, BDH)
+VDX = (KJV, DNF)
+PMX = (SFH, BGP)
+VTF = (TBV, MLH)
+LQM = (FMJ, QVV)
+VNT = (VQR, BVM)
+XML = (GCN, QFZ)
+VPF = (MVM, JXP)
+TBK = (LLQ, HQX)
+PXQ = (TLK, SBG)
+LKX = (CGV, KRM)
+DBN = (PBH, HPL)
+XXL = (CPG, PND)
+BHG = (BBR, BMS)
+VQQ = (STX, PJH)
+VHH = (RLG, TDG)
+RJK = (KPH, XHS)
+BFK = (MXV, HTX)
+VJX = (XRK, VDQ)
+GFJ = (CPN, FTQ)
+GRG = (MXD, DLJ)
+CQC = (LJN, LSR)
+RJB = (DHH, LPT)
+FGP = (CJP, PRL)
+BCM = (FFB, STD)
+FBX = (GXX, LRK)
+FLH = (VHJ, PRT)
+GTD = (THT, THT)
+GNS = (NHB, TBK)
+QTM = (XDJ, QTF)
+VGM = (KJK, FCD)
+XBD = (JNG, GCX)
+QVC = (BNV, FLT)
+FCV = (LQL, CSG)
+SCN = (NPL, VXF)
+KKL = (HVK, NMS)
+MDG = (QJD, SMS)
+QSB = (BFP, TFH)
+LKJ = (BRS, BSL)
+XCS = (HSB, LRC)
+HLB = (MDJ, RTV)
+TLJ = (NGQ, CGC)
+MNM = (CLJ, CLJ)
+STB = (HQM, FGJ)
+HJT = (TMF, KTP)
+TND = (LRF, JSL)
+FVN = (QDN, DXF)
+SNT = (TJD, DDR)
+JKM = (LKN, FVM)
+LTC = (RBP, PQH)
+STP = (CKF, NLR)
+DMG = (LSQ, PMP)
+CDX = (RFC, VPF)
+CNQ = (PXG, BSF)
+PMP = (KCC, GSP)
+VKT = (CKX, KPS)
+CKJ = (FBX, KNQ)
+VGC = (JPB, NVL)
+LCB = (QTC, FCM)
+TCF = (BDH, SFN)
+DDC = (XSX, DMB)
+SFN = (XFV, GSF)
+HXF = (GDQ, VNC)
+BPQ = (QCS, PKR)
+FFD = (TNT, XTF)
+TBV = (SFR, RJK)
+DBB = (FGM, DJR)
+FHG = (VSN, LQK)
+GGM = (DSM, NKL)
+RJV = (NMS, HVK)
+NGQ = (RJV, KKL)
+CFS = (HQV, HPS)
+PFG = (BTX, DVB)
+VCX = (QKF, CPK)
+XCQ = (MXV, HTX)
+DHH = (PRD, CGB)
+HBH = (DJR, FGM)
+RMH = (GMV, SNF)
+HXV = (QTB, FRP)
+QFZ = (CVS, NCN)
+CVK = (BDK, GMJ)
+SHQ = (QQM, BFT)
+PGQ = (XPS, JNV)
+LQR = (NTG, VCG)
+QDS = (BVB, HDJ)
+CJP = (THH, TTH)
+FNB = (GGH, MTR)
+PSN = (RXG, JSG)
+LHX = (QDN, DXF)
+GFG = (SCG, KQJ)
+PRR = (NPK, BDP)
+QSH = (LKX, BBF)
+KVV = (LBV, CRP)
+DFF = (NXB, GKX)
+JFF = (CKJ, LVQ)
+FCD = (MDG, XCV)
+SFC = (FNS, HLP)
+KPS = (BNS, CFS)
+PLN = (PNN, DHB)
+SHG = (CQM, TNP)
+GJR = (QDP, GCJ)
+NDJ = (GFX, GXH)
+XQB = (PHC, JSD)
+FKJ = (CSG, LQL)
+FRP = (KNS, JTS)
+MHX = (BKB, LCB)
+HGK = (LHS, SBV)
+JXJ = (JMG, PCS)
+NJC = (RQH, BGH)
+LLQ = (TQF, NJB)
+QFR = (BCP, CKB)
+BXK = (DQD, HRT)
+XFR = (KKD, SQM)
+XFV = (HMJ, RMH)
+HMJ = (GMV, SNF)
+BNV = (NHG, FRF)
+GXV = (LBK, LXJ)
+XNX = (NKH, FQC)
+BJR = (VKX, JCV)
+CRN = (BCX, DTB)
diff --git a/2023/rust/day8/src/lib.rs b/2023/rust/day8/src/lib.rs
new file mode 100644
index 0000000..31f2e2c
--- /dev/null
+++ b/2023/rust/day8/src/lib.rs
@@ -0,0 +1,115 @@
+use std::collections::HashMap;
+
+pub fn part1(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let lines: Vec<String> = input
+        .trim_end()
+        .split('\n')
+        .map(|x| x.to_string())
+        .collect();
+    let ltype = &lines[0];
+    let mut hm: HashMap<String, (String, String)> = HashMap::new();
+    for play in &lines[2..] {
+        hm.insert(
+            play[..3].to_string(),
+            (play[7..10].to_string(), play[12..15].to_string()),
+        );
+    }
+
+    let mut current = "AAA".to_string();
+    for i in ltype.chars().cycle() {
+        current = match i {
+            'R' => hm.get(&current).unwrap().1.clone(),
+            'L' => hm.get(&current).unwrap().0.clone(),
+            _ => panic!("wtf is this?"),
+        };
+        res += 1;
+
+        if current == "ZZZ".to_string() {
+            break;
+        }
+    }
+
+    res
+}
+
+pub fn part2(input: &str) -> u32 {
+    let mut res: u32 = 0;
+
+    let lines: Vec<String> = input
+        .trim_end()
+        .split('\n')
+        .map(|x| x.to_string())
+        .collect();
+    let ltype = &lines[0];
+    let mut hm: HashMap<String, (String, String)> = HashMap::new();
+
+    for play in &lines[2..] {
+        hm.insert(
+            play[..3].to_string(),
+            (play[7..10].to_string(), play[12..15].to_string()),
+        );
+    }
+
+    let mut currents: Vec<String> = hm
+        .keys()
+        .filter(|x| x.ends_with("A"))
+        .into_iter()
+        .map(|x| x.to_string())
+        .collect::<Vec<String>>();
+
+    dbg!("{currents:?}");
+    'o: for i in ltype.chars().cycle() {
+        for k in 0..currents.len() {
+            currents[k] = match i {
+                'R' => hm.get(&currents[k]).unwrap().1.clone(),
+                'L' => hm.get(&currents[k]).unwrap().0.clone(),
+                _ => panic!("wtf is this?"),
+            };
+            res += 1;
+        }
+
+        for current in &currents {
+            if !current.ends_with("Z") {
+                continue 'o;
+            }
+        }
+        break;
+    }
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 2);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 21389);
+    }
+
+    #[test]
+    fn example_part2() {
+        let input = include_str!("../example2.txt");
+        let result = part2(input);
+        assert_eq!(result, 12);
+    }
+
+    // #[test]
+    // fn input_part2() {
+    //     let input = include_str!("../input.txt");
+    //     let result = part2(input);
+    //     assert_eq!(result, 248179786);
+    // }
+}
diff --git a/2023/rust/day9/Cargo.toml b/2023/rust/day9/Cargo.toml
new file mode 100644
index 0000000..b5e5273
--- /dev/null
+++ b/2023/rust/day9/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day9"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rust/day9/example.txt b/2023/rust/day9/example.txt
new file mode 100644
index 0000000..539a763
--- /dev/null
+++ b/2023/rust/day9/example.txt
@@ -0,0 +1,3 @@
+0 3 6 9 12 15
+1 3 6 10 15 21
+10 13 16 21 30 45
diff --git a/2023/rust/day9/input.txt b/2023/rust/day9/input.txt
new file mode 100644
index 0000000..2d0cfd3
--- /dev/null
+++ b/2023/rust/day9/input.txt
@@ -0,0 +1,200 @@
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+-4 12 58 149 300 526 842 1263 1804 2480 3306 4297 5468 6834 8410 10211 12252 14548 17114 19965 23116
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+8 8 4 -4 -16 -32 -52 -76 -104 -136 -172 -212 -256 -304 -356 -412 -472 -536 -604 -676 -752
+26 50 92 159 258 396 580 817 1114 1478 1916 2435 3042 3744 4548 5461 6490 7642 8924 10343 11906
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diff --git a/2023/rust/day9/src/lib.rs b/2023/rust/day9/src/lib.rs
new file mode 100644
index 0000000..a1b0588
--- /dev/null
+++ b/2023/rust/day9/src/lib.rs
@@ -0,0 +1,122 @@
+pub fn part1(input: &str) -> i32 {
+    let mut res: i32 = 0;
+
+    let m: Vec<Vec<i32>> = input
+        .trim_end()
+        .split('\n')
+        .map(|x| {
+            x.split(' ')
+                .map(|y| y.parse::<i32>().unwrap())
+                .collect::<Vec<i32>>()
+        })
+        .collect();
+
+    for i in m {
+        let mut aux: Vec<Vec<i32>> = vec![i];
+
+        let mut z = 1;
+        loop {
+            aux.push(vec![]);
+            for j in 1..aux[z - 1].len() {
+                let x = aux[z - 1][j] - aux[z - 1][j - 1];
+                aux[z].push(x);
+            }
+
+            if aux[z].iter().filter(|&k| *k != 0).count() == 0 {
+                aux[z].push(0);
+                break;
+            }
+
+            z += 1;
+        }
+
+        let n = aux.len() - 1;
+        for j in (0..n).rev() {
+            let t = aux[j + 1][aux[j + 1].len() - 1];
+            let r = aux[j][aux[j].len() - 1];
+            aux[j].push(t + r);
+        }
+
+        res += aux[0][aux[0].len() - 1];
+    }
+
+    res
+}
+
+pub fn part2(input: &str) -> i32 {
+    let mut res: i32 = 0;
+
+    let m: Vec<Vec<i32>> = input
+        .trim_end()
+        .split('\n')
+        .map(|x| {
+            x.split(' ')
+                .map(|y| y.parse::<i32>().unwrap())
+                .collect::<Vec<i32>>()
+        })
+        .collect();
+
+    for i in m {
+        let mut aux: Vec<Vec<i32>> = vec![i];
+
+        let mut z = 1;
+        loop {
+            aux.push(vec![]);
+            for j in 1..aux[z - 1].len() {
+                let x = aux[z - 1][j] - aux[z - 1][j - 1];
+                aux[z].push(x);
+            }
+
+            if aux[z].iter().filter(|&k| *k != 0).count() == 0 {
+                aux[z].push(0);
+                break;
+            }
+
+            z += 1;
+        }
+
+        let n = aux.len() - 1;
+        for j in (0..n).rev() {
+            let t = aux[j + 1][0];
+            let r = aux[j][0];
+            aux[j].insert(0, r - t);
+        }
+
+        res += aux[0][0];
+    }
+
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_part1() {
+        let input = include_str!("../example.txt");
+        let result = part1(input);
+        assert_eq!(result, 114);
+    }
+
+    #[test]
+    fn input_part1() {
+        let input = include_str!("../input.txt");
+        let result = part1(input);
+        assert_eq!(result, 2008960228);
+    }
+
+    #[test]
+    fn example_part2() {
+        let input = include_str!("../example.txt");
+        let result = part2(input);
+        assert_eq!(result, 2);
+    }
+
+    #[test]
+    fn input_part2() {
+        let input = include_str!("../input.txt");
+        let result = part2(input);
+        assert_eq!(result, 71585);
+    }
+}
-- 
cgit v1.2.3-18-g5258