day 1, rust

.gitignore

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+target/
+input.txt

01/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc2024-01"
+version = "0.1.0"

01/Cargo.toml

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+[package]
+name = "aoc2024-01"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

01/src/main.rs

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+fn main() {
+    let raw = std::fs::read_to_string("input.txt").expect("Couldn't read input");
+    let mut left = Vec::new();
+    let mut right = Vec::new();
+    for line in raw.split("\n") {
+        if line.is_empty() {
+            continue;
+        }
+        let split = line
+            .split("   ")
+            .map(|x| x.parse())
+            .collect::<Result<Vec<u32>, _>>()
+            .unwrap();
+        left.push(split[0]);
+        right.push(split[1]);
+    }
+    left.sort();
+    right.sort();
+    let first = left
+        .iter()
+        .zip(right.iter())
+        .map(|(a, b)| a.max(b) - a.min(b))
+        .fold(0, |a, b| a + b);
+    println!("{}", first);
+    let second = left
+        .iter()
+        .map(|a| *a * right.iter().filter(|b| *a == **b).count() as u32)
+        .fold(0, |a, b| a + b);
+    println!("{}", second);
+}