diff options
Diffstat (limited to '2023')
| -rw-r--r-- | 2023/Cargo.toml | 2 | ||||
| -rw-r--r-- | 2023/day3/Cargo.toml | 8 | ||||
| -rw-r--r-- | 2023/day3/example.txt | 10 | ||||
| -rw-r--r-- | 2023/day3/input.txt | 140 | ||||
| -rw-r--r-- | 2023/day3/src/lib.rs | 184 |
5 files changed, 343 insertions, 1 deletions
diff --git a/2023/Cargo.toml b/2023/Cargo.toml index 4aeef49..6de40d5 100644 --- a/2023/Cargo.toml +++ b/2023/Cargo.toml @@ -1,2 +1,2 @@ [workspace] -members = ["day1", "day2"] +members = ["day1", "day2", "day3"] diff --git a/2023/day3/Cargo.toml b/2023/day3/Cargo.toml new file mode 100644 index 0000000..898e70d --- /dev/null +++ b/2023/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/day3/example.txt b/2023/day3/example.txt new file mode 100644 index 0000000..b20187f --- /dev/null +++ b/2023/day3/example.txt @@ -0,0 +1,10 @@ +467..114.. +...*...... +..35..633. +......#... +617*...... +.....+.58. +..592..... +......755. +...$.*.... +.664.598.. diff --git a/2023/day3/input.txt b/2023/day3/input.txt new file mode 100644 index 0000000..898bc27 --- /dev/null +++ b/2023/day3/input.txt @@ -0,0 +1,140 @@ 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--git a/2023/day3/src/lib.rs b/2023/day3/src/lib.rs new file mode 100644 index 0000000..e70b994 --- /dev/null +++ b/2023/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); + // } +} |