1 files changed, 168 insertions, 0 deletions
diff --git a/2022/Rust/src/day10.rs b/2022/Rust/src/day10.rs
new file mode 100644
index 0000000..992c503
--- /dev/null
+++ b/2022/Rust/src/day10.rs
@@ -0,0 +1,168 @@
+use std::{str::FromStr, string::ParseError};
+
+#[derive(Debug)]
+enum Command {
+    Addx(i32),
+    NoOp,
+}
+
+struct Crt {
+    width: usize,
+    height: usize,
+    pixels: Vec<String>,
+}
+
+struct Sprite {
+    location: i32,
+}
+
+impl Crt {
+    fn new(width: usize, height: usize) -> Self {
+        let row = ".".repeat(width);
+        let pixels = vec![row; height];
+        Crt {
+            width,
+            height,
+            pixels,
+        }
+    }
+
+    fn get_overlap_with_sprite(&self, sprite: &Sprite, cycle: i32) -> Option<i32> {
+        let x = cycle % 40;
+        if x == sprite.location || x == sprite.location - 1 || x == sprite.location + 1 {
+            Some(x)
+        } else {
+            None
+        }
+    }
+}
+
+impl Sprite {
+    fn new(intial_location: i32) -> Self {
+        Sprite {
+            location: intial_location,
+        }
+    }
+}
+
+impl FromStr for Command {
+    type Err = ParseError;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "noop" => Ok(Command::NoOp),
+            _ => {
+                let (_, value) = s.split_once(" ").unwrap();
+                Ok(Command::Addx(
+                    value.parse::<i32>().expect("Should be parsable to usize"),
+                ))
+            }
+        }
+    }
+}
+
+fn signal_strength(cycle: &usize, x_val: &i32) -> i32 {
+    *cycle as i32 * x_val
+}
+
+fn solve_part_one(data: &str) -> i32 {
+    let important_cycles: [usize; 6] = [20, 60, 100, 140, 180, 220];
+    let mut cur_cycle = 0_usize;
+    let mut x_val = 1_i32;
+    let mut total_signal_strength = 0_i32;
+    let commands: Vec<_> = data
+        .lines()
+        .map(|line| Command::from_str(line).unwrap())
+        .collect();
+    for command in commands {
+        use Command::*;
+        match command {
+            Addx(val) => {
+                for _ in 0..2 {
+                    cur_cycle += 1;
+                    if important_cycles.contains(&cur_cycle) {
+                        total_signal_strength += signal_strength(&cur_cycle, &x_val);
+                    }
+                }
+                x_val += val;
+            }
+            NoOp => {
+                cur_cycle += 1;
+                if important_cycles.contains(&cur_cycle) {
+                    total_signal_strength += signal_strength(&cur_cycle, &x_val);
+                }
+            }
+        }
+    }
+    total_signal_strength
+}
+
+fn render_grid(grid: &Vec<String>) {
+    for row in grid {
+        for ch in row.chars() {
+            match ch {
+                '#' => print!("🥳"),
+                // '#' => print!("😉"),
+                '.' => print!("🌑"),
+                _ => unreachable!(),
+            }
+        }
+        println!();
+    }
+}
+
+fn solve_part_two(data: &str) {
+    let mut cur_cycle = 0_i32;
+    let mut y_val = 0_i32;
+    let mut crt = Crt::new(40, 6);
+    let mut sprite = Sprite::new(1);
+    let commands: Vec<_> = data
+        .lines()
+        .map(|line| Command::from_str(line).unwrap())
+        .collect();
+    for command in commands {
+        use Command::*;
+        match command {
+            Addx(val) => {
+                for _ in 0..2 {
+                    if cur_cycle % 40 == 0 {
+                        if cur_cycle != 0 {
+                            y_val += 1;
+                        }
+                    }
+                    match crt.get_overlap_with_sprite(&sprite, cur_cycle) {
+                        Some(idx) => crt.pixels[y_val as usize]
+                            .replace_range((idx as usize)..=idx as usize, "#"),
+                        None => {}
+                    }
+                    cur_cycle += 1;
+                }
+                sprite.location += val;
+            }
+            NoOp => {
+                if cur_cycle % 40 == 0 {
+                    if cur_cycle != 0 {
+                        y_val += 1;
+                    }
+                }
+                match crt.get_overlap_with_sprite(&sprite, cur_cycle) {
+                    Some(idx) => {
+                        crt.pixels[y_val as usize].replace_range((idx as usize)..=idx as usize, "#")
+                    }
+                    None => {}
+                }
+                cur_cycle += 1;
+            }
+        }
+    }
+    render_grid(&crt.pixels);
+    println!();
+}
+
+fn main() {
+    let test = include_str!("../input/day10.test");
+    let prod = include_str!("../input/day10.prod");
+    println!("part1: test {:?}", solve_part_one(test));
+    println!("part1: prod {:?}", solve_part_one(prod));
+    solve_part_two(test);
+    solve_part_two(prod);
+}