initial commit

.gitignore

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+/target
+/input

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc-rs-2021"
+version = "0.1.0"
+dependencies = [
+ "aoc-runner",
+ "aoc-runner-derive",
+ "itertools",
+]
+
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Cargo.toml

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+[package]
+name = "aoc-rs-2021"
+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"
+itertools = "0.10.1"

src/day_01.rs

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+use aoc_runner_derive::{aoc, aoc_generator};
+
+use itertools::Itertools;
+
+#[aoc_generator(day1)]
+pub fn parse_measurements(input: &str) -> Vec<usize> {
+    input
+        .split('\n')
+        .map(|input| input.parse().unwrap())
+        .collect()
+}
+
+#[aoc(day1, part1)]
+pub fn count_increases_indexed(input: &[usize]) -> usize {
+    let mut count = 0;
+    for i in 1..input.len() {
+        if input[i - 1] < input[i] {
+            count += 1;
+        }
+    }
+    count
+}
+
+#[aoc(day1, part1, tuple_windows)]
+pub fn count_increases_tuple_windows(input: &[usize]) -> usize {
+    let mut count = 0;
+    for (a, b) in input.iter().tuple_windows() {
+        if a < b {
+            count += 1;
+        }
+    }
+    count
+}
+
+#[aoc(day1, part2)]
+pub fn count_sliding_increases_indexed(input: &[usize]) -> usize {
+    let mut count = 0;
+    for i in 3..input.len() {
+        if input[i - 3] + input[i - 2] + input[i - 1] < input[i - 2] + input[i - 1] + input[i] {
+            count += 1;
+        }
+    }
+    count
+}
+
+#[aoc(day1, part2, tuple_windows)]
+pub fn count_sliding_increases_tuple_windows(input: &[usize]) -> usize {
+    let mut count = 0;
+    for (a, b, c, d) in input.iter().tuple_windows() {
+        if a + b + c < b + c + d {
+            count += 1;
+        }
+    }
+    count
+}

src/lib.rs

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+use aoc_runner_derive::aoc_lib;
+
+pub mod day_01;
+
+aoc_lib! { year = 2021 }