Initial Setup

.gitignore

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+/target

Cargo.lock

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Cargo.toml

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+[package]
+name = "aoc-2025"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+dialoguer = "0.12.0"

src/day1.rs

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+
+
+pub fn run(input: &str) {
+
+}

src/main.rs

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+use dialoguer::Select;
+
+mod utils;
+mod day1;
+
+const CHOICES: [&str; 2] = [
+    "Exit",
+    "Day 1: ",
+];
+
+fn main() {
+    while let Some(choice) = get_input() {
+        match choice {
+            1 => day1::run(include_str!("inputs/day1.txt")),
+            _ => println!("Invalid selection")
+        }
+    }
+}
+
+fn get_input() -> Option<u32> {
+    let selection = Select::new()
+        .with_prompt("Select a day")
+        .items(&CHOICES)
+        .default(0)
+        .interact()
+        .unwrap() as u32;
+
+    match selection {
+        0 => None,
+        _ => Some(selection)
+    }
+}

src/utils.rs

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+#![allow(unused)]
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum Direction {
+    Up,
+    Down,
+    Left,
+    Right,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub struct Point2d {
+    pub x: i32,
+    pub y: i32,
+}
+
+impl From<(i32, i32)> for Point2d {
+    fn from(value: (i32, i32)) -> Self {
+        Point2d {
+            x: value.0,
+            y: value.1,
+        }
+    }
+}
+
+impl From<Point2d> for (i32, i32) {
+    fn from(value: Point2d) -> Self {
+        (value.x, value.y)
+    }
+}
+
+pub fn concat(a: u64, b: u64) -> u64 {
+    a * 10u64.pow(b.ilog10() + 1) + b
+}
+
+pub fn is_inbounds(bounds: (Point2d, Point2d), point: Point2d) -> bool {
+    (point.x >= bounds.0.x)
+        & (point.y >= bounds.0.y)
+        & (point.x <= bounds.1.x)
+        & (point.y <= bounds.1.y)
+}
+
+pub mod grid {
+    use super::Direction;
+
+    #[derive(Clone, Copy)]
+    pub struct Marcher {
+        pub direction: Direction,
+        pub coord: (i32, i32),
+    }
+
+    impl Marcher {
+        pub fn init(init_pos: (i32, i32), init_dir: Direction) -> Self {
+            Self {
+                direction: init_dir,
+                coord: init_pos,
+            }
+        }
+
+        pub fn peek(&self) -> (i32, i32) {
+            match self.direction {
+                Direction::Up => (self.coord.0 - 1, self.coord.1),
+                Direction::Down => (self.coord.0 + 1, self.coord.1),
+                Direction::Left => (self.coord.0, self.coord.1 - 1),
+                Direction::Right => (self.coord.0, self.coord.1 + 1),
+            }
+        }
+
+        pub fn step(&mut self) -> (i32, i32) {
+            let new_pos = self.peek();
+            self.coord = new_pos;
+            new_pos
+        }
+
+        pub fn turn_cw(&mut self) -> Direction {
+            match self.direction {
+                Direction::Up => self.direction = Direction::Right,
+                Direction::Right => self.direction = Direction::Down,
+                Direction::Down => self.direction = Direction::Left,
+                Direction::Left => self.direction = Direction::Up,
+            }
+            self.direction
+        }
+
+        pub fn turn_ccw(&mut self) -> Direction {
+            match self.direction {
+                Direction::Up => self.direction = Direction::Left,
+                Direction::Left => self.direction = Direction::Down,
+                Direction::Down => self.direction = Direction::Right,
+                Direction::Right => self.direction = Direction::Up,
+            }
+            self.direction
+        }
+
+        pub fn set_direction(&mut self, dir: Direction) -> &mut Self {
+            self.direction = dir;
+            self
+        }
+    }
+}