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use std::fs;
use std::io::{self, BufRead};
#[derive(Debug, PartialEq)]
enum Hand {
Rock,
Paper,
Scissors,
}
fn translate(play: &str) -> Hand {
match play {
"A" | "X" => Hand::Rock,
"B" | "Y" => Hand::Paper,
"C" | "Z" => Hand::Scissors,
&_ => panic!(),
}
}
fn weight(play: Hand) -> u32 {
match play {
Hand::Rock => 1,
Hand::Paper => 2,
Hand::Scissors => 3,
}
}
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,
}
}
fn main() -> std::io::Result<()> {
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));
} else {
todo!()
};
}
println!("{}", score);
Ok(())
}
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