Day 1

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc2022"
+version = "0.1.0"

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]

rustfmt.toml

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+unstable_features = true
+hard_tabs = true
+max_width = 80
+imports_granularity = 'Crate'
+group_imports = 'StdExternalCrate'
+format_strings = true
+wrap_comments = true
+blank_lines_lower_bound = 0
+blank_lines_upper_bound = 2

src/day1.rs

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+pub mod a {
+	static INPUT: &str = include_str!("inputs/day1a.txt");
+
+	pub fn go() {
+		let input = INPUT;
+		let max = input
+			.split("\n\n")
+			.map(|elf_cals_str| {
+				elf_cals_str
+					.split('\n')
+					.filter(|s| !s.is_empty())
+					.map(|cal_str| cal_str.parse::<u32>().unwrap())
+					.sum::<u32>()
+			})
+			.max()
+			.unwrap();
+
+		println!("{}", max);
+	}
+}
+
+pub mod b {
+	static INPUT: &str = include_str!("inputs/day1a.txt");
+
+	pub fn go() {
+		let input = INPUT;
+		let mut cals: Vec<_> = input
+			.split("\n\n")
+			.map(|elf_cals_str| {
+				elf_cals_str
+					.split('\n')
+					.filter(|s| !s.is_empty())
+					.map(|cal_str| cal_str.parse::<u32>().unwrap())
+					.sum::<u32>()
+			})
+			.collect();
+
+		cals.sort_by(|a, b| a.cmp(b).reverse());
+
+		let total = cals.iter().take(3).sum::<u32>();
+
+		println!("{}", total);
+	}
+}

src/main.rs

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+mod day1;
+
+fn main() {
+	day1::b::go();
+}