static INPUT: &str = include_str!("input.txt"); #[derive(Debug)] enum LightCommand { TurnOff, TurnOn, Toggle } fn main() { let valueified = INPUT.split('\n').filter(|s| !s.is_empty()).map(|s| { let mut rsplit = s.rsplit(' '); let mut cd = rsplit.next().unwrap().split(',').map(str::parse::).map(Result::unwrap); let mut ab = rsplit.nth(1).unwrap().split(',').map(str::parse::).map(Result::unwrap); let ab = (ab.next().unwrap(), ab.next().unwrap()); let cd = (cd.next().unwrap(), cd.next().unwrap()); match &s[0..7] { "turn on" => (LightCommand::TurnOn, ab,cd), "toggle " => (LightCommand::Toggle, ab,cd), "turn of" => (LightCommand::TurnOff, ab,cd), _ => unreachable!() } }); let mut lights = vec![false; 1_000_000]; for (cmd, (x1, y1), (x2, y2)) in valueified.clone() { use LightCommand::*; for x in x1..=x2 { for y in y1..=y2 { match cmd { TurnOff => { lights[x + y * 1000] = false; }, TurnOn => { lights[x + y * 1000] = true; }, Toggle => { lights[x + y * 1000] = !lights[x + y * 1000]; } } } } } let light_count = lights.into_iter().filter(|a| *a).count(); println!("Lit light count: {light_count}"); let mut lights = vec![0u64; 1_000_000]; for (cmd, (x1, y1), (x2, y2)) in valueified { use LightCommand::*; for x in x1..=x2 { for y in y1..=y2 { match cmd { TurnOff if lights[x + y * 1000] != 0 => { lights[x + y * 1000] -= 1; }, TurnOn => { lights[x + y * 1000] += 1; }, Toggle => { lights[x + y * 1000] += 2 }, _ => () } } } } let light_count = lights.into_iter().sum::(); println!("Lit light count(Ancient Nordic Elvish): {light_count}"); }