initial setup and 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/days/day1.rs

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+use aoc_runner_derive::{aoc, aoc_generator};
+
+#[aoc_generator(day1)]
+fn day1_generator(s: &str) -> Vec<Vec<u32>> {
+    let mut iter = s.lines();
+
+    let mut res = Vec::new();
+    let mut current = Vec::new();
+
+    loop {
+        match iter.next() {
+            Some("") => {
+                res.push(current);
+                current = Vec::new();
+            }
+            Some(s) => {
+                current.push(s.parse::<u32>().unwrap());
+            }
+            None => {
+                res.push(current);
+                return res;
+            }
+        }
+    }
+}
+
+#[aoc(day1, part1)]
+fn day1_part1(input: &[Vec<u32>]) -> u32 {
+    input.iter().map(|v| v.iter().sum()).max().unwrap()
+}
+
+#[aoc(day1, part2)]
+fn day1_part2(input: &[Vec<u32>]) -> u32 {
+    let mut res = (0, 0, 0);
+    for mut item in input.iter().map(|v| v.iter().sum()) {
+        if res.0 < item {
+            std::mem::swap(&mut item, &mut res.0)
+        }
+
+        if res.1 < item {
+            std::mem::swap(&mut item, &mut res.1)
+        }
+
+        if res.2 < item {
+            std::mem::swap(&mut item, &mut res.2)
+        }
+    }
+    res.0 + res.1 + res.2
+}

src/lib.rs

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+use aoc_runner_derive::aoc_lib;
+
+mod days {
+    mod day1;
+}
+
+aoc_lib! { year = 2022 }