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47 lines
1.5 KiB
Rust
47 lines
1.5 KiB
Rust
use std::fs;
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fn main() {
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let contents = fs::read_to_string("data.txt").expect("Failed to read file");
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let lines = contents.trim().lines();
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let turns: Vec<(&str, &str)> = lines
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.map(|x| (x.get(0..1).unwrap(), x.get(2..3).unwrap()))
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.collect();
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let scores: Vec<usize> = turns.iter().map(score_part1).collect();
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let final_score_part1: usize = scores.iter().sum();
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println!("Game 1 score: {final_score_part1}");
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let scores2: Vec<usize> = turns.iter().map(score_part2).collect();
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let final_score_part2: usize = scores2.iter().sum();
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println!("Game 2 score: {:?}", final_score_part2);
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}
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fn type_points(play: &str) -> usize {
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match play {
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"X" => 1,
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"Y" => 2,
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_ => 3,
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}
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}
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fn win_points(turn: (&str, &str)) -> usize {
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match turn {
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("C", "X") | ("A", "Y") | ("B", "Z") => 6, // win
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("A", "X") | ("B", "Y") | ("C", "Z") => 3, // draw
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_ => 0, // loss
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}
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}
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fn score_part1(turn: &(&str, &str)) -> usize {
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win_points(*turn) + type_points(turn.1)
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}
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fn score_part2(turn: &(&str, &str)) -> usize {
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let my_move: &str = match turn {
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("A", "X") | ("B", "Z") | ("C", "Y") => "Z", // lose to rock, win to paper, or draw with scissors -> I play scissors
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("A", "Y") | ("B", "X") | ("C", "Z") => "X", // draw with rock, lose to paper, win to scissors -> I play rock
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_ => "Y", // anything else -> I play paper
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};
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win_points((turn.0, my_move)) + type_points(my_move)
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}
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