diff options
| -rw-r--r-- | AoC2022/02/makefile | 1 | ||||
| -rw-r--r-- | AoC2022/02/solver.rs | 82 |
2 files changed, 68 insertions, 15 deletions
diff --git a/AoC2022/02/makefile b/AoC2022/02/makefile index 73929a6..630e630 100644 --- a/AoC2022/02/makefile +++ b/AoC2022/02/makefile @@ -11,3 +11,4 @@ run: emacs -batch -l ert -l solver.el -f ert-run-tests-batch-and-exit sbcl --load ~/.sbclrc --script solver.lisp + rustc solver.rs && ./solver diff --git a/AoC2022/02/solver.rs b/AoC2022/02/solver.rs index 1f9a394..2fd1e62 100644 --- a/AoC2022/02/solver.rs +++ b/AoC2022/02/solver.rs @@ -1,7 +1,7 @@ use std::fs; use std::io::{self, BufRead}; -#[derive(Debug, PartialEq)] +#[derive(Debug, PartialEq, Clone)] enum Hand { Rock, Paper, @@ -25,28 +25,80 @@ fn weight(play: Hand) -> u32 { } } +enum Conclusion { + Loose, + Draw, + Win, +} + +fn strategy(play: &str) -> Conclusion { + match play { + "X" => Conclusion::Loose, + "Y" => Conclusion::Draw, + "Z" => Conclusion::Win, + &_ => panic!("Invalid input"), + } +} +fn wins(play: Hand) -> Hand { + match play { + Hand::Rock => Hand::Scissors, + Hand::Scissors => Hand::Paper, + Hand::Paper => Hand::Rock, + } +} +fn looses(play: Hand) -> Hand { + match play { + Hand::Scissors => Hand::Rock, + Hand::Paper => Hand::Scissors, + Hand::Rock => Hand::Paper, + } +} + +fn pick_move(strategy: Conclusion, other: Hand) -> Hand { + match strategy { + Conclusion::Draw => other, + Conclusion::Win => looses(other), + Conclusion::Loose => wins(other), + } +} + fn fight(my: Hand, other: Hand) -> u32 { match (my, other) { (a, b) if a == b => 3, - (Hand::Rock, Hand::Scissors) - | (Hand::Scissors, Hand::Paper) - | (Hand::Paper, Hand::Rock) => 6, - _ => 0, + (a, b) => { + if wins(a) == b { + 6 + } else { + 0 + } + } } } -fn main() -> std::io::Result<()> { +fn fixed_plays(my: &str, _oponent: Hand) -> Hand { + translate(my) +} + +fn reactive_plays(my: &str, oponent: Hand) -> Hand { + pick_move(strategy(my), oponent) +} + +fn solver(strategy: &dyn Fn(&str, Hand) -> Hand) -> u32 { let file = fs::File::open("input").unwrap(); let lines = io::BufReader::new(file).lines(); - let mut score = 0; - for line in lines { - if let [ot, my] = line?.split_whitespace().collect::<Vec<_>>()[..] { - score += fight(translate(my), translate(ot)) + weight(translate(my)); + lines.fold(0, |acc, line| { + if let [ot, my] = line.unwrap().split_whitespace().collect::<Vec<_>>()[..] { + let opo = translate(ot); + let my_hand = strategy(my, opo.clone()); + acc + fight(my_hand.clone(), opo) + weight(my_hand) } else { - todo!() - }; - } + panic!("Wrong line") + } + }) +} - println!("{}", score); - Ok(()) +fn main() { + assert_eq!(12535, solver(&fixed_plays)); + assert_eq!(15457, solver(&reactive_plays)); + println!("All test passed.") } |