Day 10

res/10/input.txt

@@ -0,0 +1,143 @@
+addx 2
+addx 3
+noop
+noop
+addx 1
+addx 5
+addx -1
+addx 5
+addx 1
+noop
+noop
+addx 4
+noop
+noop
+addx 5
+addx -5
+addx 6
+addx 3
+addx 1
+addx 5
+addx 1
+noop
+addx -38
+addx 41
+addx -22
+addx -14
+addx 7
+noop
+noop
+addx 3
+addx -2
+addx 2
+noop
+addx 17
+addx -12
+addx 5
+addx 2
+addx -16
+addx 17
+addx 2
+addx 5
+addx 2
+addx -30
+noop
+addx -6
+addx 1
+noop
+addx 5
+noop
+noop
+noop
+addx 5
+addx -12
+addx 17
+noop
+noop
+noop
+noop
+addx 5
+addx 10
+addx -9
+addx 2
+addx 5
+addx 2
+addx -5
+addx 6
+addx 4
+noop
+noop
+addx -37
+noop
+noop
+addx 17
+addx -12
+addx 30
+addx -23
+addx 2
+noop
+addx 3
+addx -17
+addx 22
+noop
+noop
+noop
+addx 5
+noop
+addx -10
+addx 11
+addx 4
+noop
+addx 5
+addx -2
+noop
+addx -6
+addx -29
+addx 37
+addx -30
+addx 27
+addx -2
+addx -22
+noop
+addx 3
+addx 2
+noop
+addx 7
+addx -2
+addx 2
+addx 5
+addx -5
+addx 6
+addx 2
+addx 2
+addx 5
+addx -25
+noop
+addx -10
+noop
+addx 1
+noop
+addx 2
+noop
+noop
+noop
+noop
+addx 7
+addx 1
+addx 4
+addx 1
+noop
+addx 2
+noop
+addx 3
+addx 5
+addx -1
+noop
+addx 3
+addx 5
+addx 2
+addx 1
+noop
+noop
+noop
+noop

src/days/d10.rs

@@ -0,0 +1,79 @@
+use std::fs;
+
+pub fn solve() {
+    let path = "res/10/input.txt";
+
+    let contents = fs::read_to_string(path).expect("I/O error, wrong path?");
+
+    let lines: Vec<&str> = contents
+        .lines()
+        .filter(|line| *line != "")
+        .collect();
+    
+    let mut reg_x = 1;
+    let mut cycle = 0;
+    let mut signal_strengths = Vec::<i32>::new();
+
+    let mut crt = Vec::<bool>::new();
+
+    // parse commands line by line
+    lines.iter().for_each(|line| {
+        let parts: Vec<&str> = line.split_whitespace().collect();
+        match parts[0] {
+            "noop" => {
+                // increase cycle 1 time
+                cycle += 1;
+                if rel_cycle(cycle) {
+                    signal_strengths.push(cycle*reg_x);
+                }
+                crt.push(sprite_draw(cycle, reg_x));
+            },
+            "addx" => {
+                // increase cycle 2 times
+                (0..2).for_each(|_| {
+                    cycle += 1;
+                    if rel_cycle(cycle) {
+                        signal_strengths.push(cycle*reg_x);
+                    }
+                    crt.push(sprite_draw(cycle, reg_x));
+                });
+                // change regX according to parameter
+                reg_x += parts[1].parse::<i32>().unwrap();
+            },
+            _ => {}
+        }
+    });
+
+    let res: i32 = signal_strengths.iter().sum();
+
+    println!("Result 1: {}", res);
+
+    println!("Result 2: ");
+    let mut print_buffer = "".to_string();
+    // print the crt line by line
+    crt.iter().enumerate().for_each(|(i, p)| {
+        if *p { print_buffer += "#" } 
+        else { print_buffer += "." }
+
+        // print buffer if a line is completed
+        if (i+1) % 40 == 0  {
+            println!("{}", print_buffer);
+            print_buffer = "".to_string();
+        }
+    })
+    
+}
+
+// returns whether the passed cycle is a relevant one
+fn rel_cycle(cycle: i32) -> bool {
+    if (cycle-20) % 40 == 0 && cycle >= 20 {
+        true
+    } else {
+        false
+    }
+}
+
+// returns whether the sprite is currently in a position to draw a pixel
+fn sprite_draw(cycle: i32, reg_x: i32) -> bool {
+    return ((cycle-1)%40).abs_diff(reg_x) <= 1
+}

src/main.rs

@@ -1,7 +1,7 @@
 pub mod days;
 
 fn main() {
-    days::d09::solve()
+    days::d10::solve()
 }
 
 fn _all_days() {
@@ -23,4 +23,6 @@ fn _all_days() {
     days::d08::solve();
     println!("\nDay 9");
     days::d09::solve();
+    println!("\nDay 10");
+    days::d10::solve();
 }