71 lines
1.9 KiB
Rust
71 lines
1.9 KiB
Rust
#![allow(dead_code)]
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use std::fs::File;
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use std::io;
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use std::io::BufRead;
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use std::path::Path;
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use std::time::Instant;
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fn main() {
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let now = Instant::now();
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part_one();
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let part_one_duration = now.elapsed();
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part_two();
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let part_two_duration = now.elapsed();
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println!(
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"p1: {}ms, p2: {}ms",
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part_one_duration.as_millis(),
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(part_two_duration - part_one_duration).as_millis()
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);
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}
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fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
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where
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P: AsRef<Path>,
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{
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// note that this discards a final newline
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let file = File::open(filename)?;
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Ok(io::BufReader::new(file).lines())
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}
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fn part_one() {
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if let Ok(lines) = read_lines("./inputs/input") {
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let mut score = 0;
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for line in lines {
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let l = line.unwrap();
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let them = l.chars().nth(0).unwrap() as u32 - 64;
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let you = l.chars().nth(2).unwrap() as u32 - 87;
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score += you;
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// 1 is Rock
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// 2 is Paper
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// 3 is Scissors
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if you == them {
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score += 3;
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} else if them == 1 && you == 2 {
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score += 6
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} else if them == 2 && you == 3 {
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score += 6
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} else if them == 3 && you == 1 {
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score += 6
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}
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}
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println!("{}", score)
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}
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}
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fn part_two() {
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if let Ok(lines) = read_lines("./inputs/input") {
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let mut score = 0;
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for line in lines {
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let l = line.unwrap();
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let them = l.chars().nth(0).unwrap() as u32 - 64;
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let outcome = l.chars().nth(2).unwrap() as u32 - 87;
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// 1 is Rock / you lose
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// 2 is Paper / you tie
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// 3 is Scissors / you win
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// compute what you throw plus the score of the round
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score += ((them + outcome) % 3) + 1 + (outcome - 1) * 3;
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}
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println!("{}", score)
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}
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}
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