day 1 part 1 and 2

Author: paulcacheux

inputs/2024/day1_test.txt

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+3   4
+4   3
+2   5
+1   3
+3   9
+3   3

results/2024.json

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+[
+    {
+        "day": 1,
+        "part1": "1660292",
+        "part2": "22776016"
+    }
+]

src/aoc2024/day1.rs

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+use crate::aoc2024::Aoc2024;
+use crate::traits::days::Day1;
+use crate::traits::ParseInput;
+use crate::traits::Solution;
+
+impl ParseInput<Day1> for Aoc2024 {
+    type Parsed = (Vec<u32>, Vec<u32>);
+
+    fn parse_input(input: &str) -> Self::Parsed {
+        let mut lefts = Vec::new();
+        let mut rights = Vec::new();
+        
+        for line in input.lines() {
+            let line = line.trim();
+
+            if line.is_empty() {
+                continue
+            }
+
+            let mut parts = line.split_ascii_whitespace();
+            let left = parts.next().unwrap().parse().unwrap();
+            let right = parts.next().unwrap().parse().unwrap();
+
+            lefts.push(left);
+            rights.push(right);
+        }
+
+        (lefts, rights)
+    }
+}
+
+impl Solution<Day1> for Aoc2024 {
+    type Part1Output = u32;
+    type Part2Output = u32;
+
+    fn part1((left, right): &(Vec<u32>, Vec<u32>)) -> u32 {
+        let mut left = left.clone();
+        left.sort();
+
+        let mut right = right.clone();
+        right.sort();
+
+        left.into_iter().zip(right).map(|(l, r)| l.abs_diff(r)).sum()
+    }
+
+    fn part2((left, right): &(Vec<u32>, Vec<u32>)) -> u32 {
+        let mut score = 0;
+
+        for l in left {
+            let count = right.iter().filter(|&r| r == l).count() as u32;
+            score += l * count;
+        }
+
+        score
+    }
+}

src/aoc2024/mod.rs

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+use crate::helpers::{run, Results, TimingData};
+use crate::traits::days::*;
+
+pub struct Aoc2024;
+
+pub mod day1;
+
+pub fn run_solution_for_day(day: u32, input: &str, results: Option<Results>) -> Option<TimingData> {
+    let r = results
+        .as_ref()
+        .and_then(|r| r.results_for_day(day as usize));
+
+    let elapsed = match day {
+        1 => run::<Aoc2024, Day1>(input, r),
+        _ => return None,
+    };
+    Some(elapsed)
+}