Day 1 puzzle

.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 = "aocrust"
+version = "0.1.0"
+dependencies = [
+ "day1",
+]
+
+[[package]]
+name = "day1"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "aocrust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[workspace]
+members = [
+	"day1"
+]
+
+[dependencies]
+day1 = { path = "./day1" }

day1/Cargo.toml

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+[package]
+name = "day1"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

day1/src/lib.rs

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+use std::fs;
+
+pub fn start() {
+	let input = fs::read_to_string("./day1/src/input.txt").unwrap();
+	let elves = input.split("\n");
+	let mut elves_cals: Vec<(u32, u32)> = vec![];
+	let mut i = 1;
+	let mut sum = 0;
+	for cal in elves {
+		match cal.parse::<u32>() {
+			Ok(cal) => sum += cal,
+			Err(_) => {
+				elves_cals.push((i, sum));
+				i += 1;
+				sum = 0;
+			},
+		}
+	}
+
+	elves_cals.sort_by(|a, b| b.1.cmp(&a.1));
+
+	println!("{:?}", elves_cals.get(0).unwrap());
+
+	let res: u32 = elves_cals
+		.iter()
+		.map(|f| f.1)
+		.take(3).sum();
+
+	println!("{:?}", res);
+}

src/main.rs

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+use day1;
+
+fn main() {
+    day1::start();
+}