61 lines
2.4 KiB
Rust
61 lines
2.4 KiB
Rust
use std::io::{self, BufRead};
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fn main() {
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let max_red: u32 = 12;
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let max_green: u32 = 13;
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let max_blue: u32 = 14;
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let lines = read_lines("input.txt");
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let mut sum_ind_possible: u32 = 0;
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let mut sum_ind_minpower: u32 = 0;
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for line in lines {
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let mut game_possible = true;
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let Ok(game) = line else { panic!("Line not ok"); };
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let Some(colon) = game.find(':') else { panic!("Could not find ':'"); };
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let game_index = &game[5..colon].parse::<u32>().unwrap();
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let mut red = 0;
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let mut green = 0;
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let mut blue = 0;
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for samples in game[colon+2..].split("; ") {
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for color_value in samples.split(", ") {
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let mut iter = color_value.split(' ');
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let count;
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if let Some(c) = iter.next() { count = c.parse::<u32>().unwrap(); } else { panic!("Invalid line: {}", game); };
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let Some(color) = iter.next() else { panic!("Invalid line: {}", game); };
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// println!("Color={}, value={}", color, count);
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let do_color = |value: u32, colorvalue: &mut u32, max_color: u32| {
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if value > *colorvalue {
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*colorvalue = value;
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}
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return value <= max_color;
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};
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game_possible &= match color {
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"red" => do_color(count, &mut red, max_red),
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"green" => do_color(count, &mut green, max_green),
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"blue" => do_color(count, &mut blue, max_blue),
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_ => false,
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};
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}
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}
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if game_possible { sum_ind_possible += game_index };
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sum_ind_minpower += red * green * blue;
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}
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println!("Sum of indices of possible games: {}", sum_ind_possible);
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println!("Sum of power of minimum sets: {}", sum_ind_minpower);
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}
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// fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<std::fs::File>>>
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// where P: AsRef<std::path::Path>, {
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// let file = std::fs::File::open(filename)?;
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// Ok(std::io::BufReader::new(file).lines())
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// }
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fn read_lines<P>(filename: P) -> io::Lines<io::BufReader<std::fs::File>>
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where P: AsRef<std::path::Path>, {
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return match std::fs::File::open(filename) {
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Err(why) => panic!("Could not open file. {}", why),
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Ok(file) => std::io::BufReader::new(file).lines()
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};
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}
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