Simple challenge for today. Misread the instructions a few times but
implementing it wasn't too bad.
This commit is contained in:
Peter 2022-12-10 15:42:24 +08:00
parent dd3ec11462
commit e046630404

View File

@ -1,3 +1,74 @@
use std::{collections::HashSet, fs::read_to_string};
const PATH: &str = "src/input";
fn main() { fn main() {
println!("Hello, world!"); let binding = read_to_string(PATH).expect("Error reading file");
assert!(binding.is_ascii());
let data = binding.trim().split('\n').into_iter();
// SCREEN OUTPUT
let mut vga = HashSet::<(i32, i32)>::new();
// REGISTERS
let mut rx = 1;
let mut ra = 0; // SIGNAL STRENGTH SUM
let mut rclk = 0;
macro_rules! update_clk {
() => {
// OUTPUT TO SCREEN
// CHECK ALL 3 POSITIONS OF SPRITE.
for dx in -1..=1 {
if rclk % 40 == rx + dx {
vga.insert((rx + dx, rclk / 40));
}
}
// INCREMENT CLOCK
rclk += 1;
// UPDATE VOLTAGE COUNTER REGISTER
if (rclk - 20) % 40 == 0 {
ra += rclk * rx;
}
};
}
for instruction in data {
let mut tokens = instruction.split(' ');
// MATCH MNENOMIC AND UPDATE CLOCK
let mnenomic = tokens.next().unwrap();
match mnenomic {
"addx" => {
let operand = tokens.next().unwrap().parse::<i32>().unwrap();
// TWO CYCLES
update_clk!();
update_clk!();
rx += operand;
}
"noop" | _ => {
// ONE CYCLE
update_clk!();
}
}
}
println!("PART 1 {}", ra);
println!("PART 2");
print_screen(vga);
}
fn print_screen(vga: HashSet<(i32, i32)>) {
for j in 0..6 {
for i in 0..40 {
if vga.contains(&(i, j)) {
print!("#");
} else {
print!(".");
}
}
println!();
}
} }