3 files changed, 65 insertions, 0 deletions

diff --git a/2022/10/a.rs b/2022/10/a.rs
new file mode 100644
index 0000000..cdab283
--- /dev/null
+++ b/2022/10/a.rs
@@ -0,0 +1,23 @@
+mod common;
+use common::*;
+
+fn main() {
+    let mut x: i64 = 1;
+    let mut cycles: usize = 0;
+    let mut step: usize = 20;
+    let mut score: i64 = 0;
+    let mut line = String::new();
+    while std::io::stdin().read_line(&mut line).unwrap() > 0 {
+        let oldx = x;
+        match read_instruction(&line) {
+            Instruction::Add(n) => { x += n; cycles += 2; },
+            Instruction::Noop => { cycles += 1; }
+        }
+        if cycles >= step {
+            score += oldx * (step as i64);
+            step += 40;
+        }
+        line.clear();
+    }
+    println!("{score}");
+}
diff --git a/2022/10/b.rs b/2022/10/b.rs
new file mode 100644
index 0000000..ab0091f
--- /dev/null
+++ b/2022/10/b.rs
@@ -0,0 +1,29 @@
+mod common;
+use common::*;
+
+fn draw(cycles: usize, x: i64) {
+    let c = cycles % 40;
+    if cycles > 0 && c == 0 { println!(); }
+    print!("{}", if (x - (c as i64)).abs() <= 1 { '#' } else { '.' });
+}
+
+fn main() {
+    let mut x: i64 = 1;
+    let mut cycles: usize = 0;
+    let mut line = String::new();
+    while std::io::stdin().read_line(&mut line).unwrap() > 0 {
+        match read_instruction(&line) {
+            Instruction::Add(n) => {
+                draw(cycles, x);
+                draw(cycles+1, x);
+                cycles += 2;
+                x += n;
+            },
+            Instruction::Noop => {
+                draw(cycles, x);
+                cycles += 1;
+            }
+        }
+        line.clear();
+    }
+}
diff --git a/2022/10/common.rs b/2022/10/common.rs
new file mode 100644
index 0000000..c2216a0
--- /dev/null
+++ b/2022/10/common.rs
@@ -0,0 +1,13 @@
+pub enum Instruction {
+    Add(i64),
+    Noop
+}
+
+pub fn read_instruction(line: &str) -> Instruction {
+    if &line[..4] == "addx" {
+        let n = line[5..line.len()-1].parse::<i64>().unwrap();
+        Instruction::Add(n)
+    } else {
+        Instruction::Noop
+    }
+}