Day 1 part 1

day-1/Cargo.toml

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+[package]
+name = "day-1"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

day-1/src/main.rs

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+use std::fs::File;
+use std::io::prelude::*;
+
+#[derive(Debug)]
+enum Direction {
+    LEFT,
+    RIGHT,
+}
+
+impl Direction {
+    fn from_str(s: &str) -> Self {
+        match s {
+            "L" => Direction::LEFT,
+            "R" => Direction::RIGHT,
+            _ => Direction::RIGHT,
+        }
+    }
+}
+
+fn parse_input() -> Vec<(Direction, i32)> {
+    let mut file = File::open("input.txt").unwrap();
+    let mut buffer = String::new();
+    file.read_to_string(&mut buffer).unwrap();
+    return buffer
+        .lines()
+        .map(|line| {
+            let (dir, steps) = line.split_at(1);
+            (Direction::from_str(dir), steps.parse().unwrap())
+        })
+        .collect::<Vec<(Direction, i32)>>();
+}
+
+fn part_1() {
+    let input = parse_input();
+    let mut dial = 50;
+    let mut counter = 0;
+    for (dir, steps) in input {
+        dial += match dir {
+            Direction::LEFT => steps * -1,
+            Direction::RIGHT => steps,
+        };
+        dial = dial % 100;
+        if dial == 0 {
+            counter += 1;
+        }
+    }
+    println!("{}", counter);
+}
+
+fn main() {
+    println!("Part 1:");
+    part_1();
+}