Day 1

.gitignore

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+/target
+/Cargo.lock
+/input

Cargo.toml

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+[package]
+name = "aoc2022"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+aoc-runner = "0.3.0"
+aoc-runner-derive = "0.3.0"

src/day01.rs

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+use aoc_runner_derive::{aoc, aoc_generator};
+
+#[aoc_generator(day1)]
+pub fn input_generator(input: &str) -> Vec<Vec<u64>> {
+    input
+        .lines()
+        .collect::<Vec<_>>()
+        .split(|el| el == &"")
+        .map(|list| {
+            list.iter()
+                .map(|el| el.parse::<u64>().unwrap())
+                .collect::<Vec<_>>()
+        })
+        .collect::<Vec<_>>()
+}
+
+#[aoc(day1, part1)]
+pub fn solve_part1(input: &[Vec<u64>]) -> u64 {
+    let mut sums = input
+        .iter()
+        .map(|el| el.iter().sum::<u64>())
+        .collect::<Vec<_>>();
+    sums.sort();
+    sums.pop().unwrap()
+}
+
+#[aoc(day1, part2)]
+pub fn solve_part2(input: &[Vec<u64>]) -> u64 {
+    let mut sums = input
+        .iter()
+        .map(|el| el.iter().sum::<u64>())
+        .collect::<Vec<_>>();
+    sums.sort();
+    sums[sums.len() - 3..sums.len()].iter().sum::<u64>()
+}

src/lib.rs

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+use aoc_runner_derive::aoc_lib;
+
+pub mod day01;
+
+aoc_lib! { year = 2022 }