From e18c62168b17557e8106cbca1197af47127330d9 Mon Sep 17 00:00:00 2001
From: Santo Cariotti <santo@dcariotti.me>
Date: Mon, 5 Dec 2022 20:17:33 +0100
Subject: Add day 1 for 2022

---
 2022/day1/Cargo.toml  |    8 +
 2022/day1/example.txt |   14 +
 2022/day1/input.txt   | 2266 +++++++++++++++++++++++++++++++++++++++++++++++++
 2022/day1/src/lib.rs  |   72 ++
 4 files changed, 2360 insertions(+)
 create mode 100644 2022/day1/Cargo.toml
 create mode 100644 2022/day1/example.txt
 create mode 100644 2022/day1/input.txt
 create mode 100644 2022/day1/src/lib.rs

diff --git a/2022/day1/Cargo.toml b/2022/day1/Cargo.toml
new file mode 100644
index 0000000..a3c4e52
--- /dev/null
+++ b/2022/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/2022/day1/example.txt b/2022/day1/example.txt
new file mode 100644
index 0000000..2094f91
--- /dev/null
+++ b/2022/day1/example.txt
@@ -0,0 +1,14 @@
+1000
+2000
+3000
+
+4000
+
+5000
+6000
+
+7000
+8000
+9000
+
+10000
diff --git a/2022/day1/input.txt b/2022/day1/input.txt
new file mode 100644
index 0000000..6c1f923
--- /dev/null
+++ b/2022/day1/input.txt
@@ -0,0 +1,2266 @@
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diff --git a/2022/day1/src/lib.rs b/2022/day1/src/lib.rs
new file mode 100644
index 0000000..26df697
--- /dev/null
+++ b/2022/day1/src/lib.rs
@@ -0,0 +1,72 @@
+pub fn get_sums(input: &str) -> Vec<i32> {
+    let groups: Vec<&str> = input.split("\n\n").collect::<Vec<&str>>();
+    let data_groups = groups
+        .into_iter()
+        .map(|x| {
+            let numbers: i32 = x
+                .split('\n')
+                .map(|x| x.parse::<i32>().unwrap_or_default())
+                .sum();
+
+            return numbers;
+        })
+        .collect::<Vec<i32>>();
+
+    data_groups
+}
+
+pub fn part1(input: &str) -> i32 {
+    let sums = get_sums(input);
+
+    sums.into_iter().max().unwrap()
+}
+
+pub fn part2(input: &str) -> i32 {
+    let mut sums = get_sums(input);
+
+    sums.sort();
+    sums.reverse();
+
+    sums[0] + sums[1] + sums[2]
+}
+
+#[cfg(test)]
+mod day1_tests {
+    use super::*;
+
+    #[test]
+    fn test_example() {
+        let data = include_str!("../example.txt");
+
+        let result = part1(data);
+
+        assert_eq!(result, 24000);
+    }
+
+    #[test]
+    fn test_input() {
+        let data = include_str!("../input.txt");
+
+        let result = part1(data);
+
+        assert_eq!(result, 69912);
+    }
+
+    #[test]
+    fn test_example_part2() {
+        let data = include_str!("../example.txt");
+
+        let result = part2(data);
+
+        assert_eq!(result, 45000);
+    }
+
+    #[test]
+    fn test_input_part2() {
+        let data = include_str!("../input.txt");
+
+        let result = part2(data);
+
+        assert_eq!(result, 208180);
+    }
+}
-- 
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