47 lines
1.3 KiB
Rust
47 lines
1.3 KiB
Rust
use std::time::{Duration, Instant};
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pub fn run(print: bool) -> Duration {
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let file_string = std::fs::read_to_string("inputs/day02").unwrap();
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let instant = Instant::now();
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let rules: Vec<(usize, usize, char, &str)> = file_string
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.lines()
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.flat_map(|rule| {
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let mut splitc = rule.splitn(2, ' ');
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let mut split_range = splitc.next()?.split('-');
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let min: usize = split_range.next()?.parse().ok()?;
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let max: usize = split_range.next()?.parse().ok()?;
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let rest = splitc.next()?;
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let c = rest.chars().next()?;
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let pw = &rest[3..];
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Some((min, max, c, pw))
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})
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.collect();
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let part1 = rules
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.iter()
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.filter(|(min, max, c, pw)| {
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let c = &pw.chars().filter(|n| n == c).count();
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min <= c && c <= max
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})
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.count();
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let part2 = rules
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.iter()
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.filter(|(min, max, c, pw)| {
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let mut chars = pw.chars();
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let a = chars.nth(min - 1) == Some(*c);
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let b = chars.nth(max - min - 1) == Some(*c);
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a ^ b
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})
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.count();
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let elapsed = instant.elapsed();
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if print {
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dbg!(elapsed, part1, part2);
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}
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elapsed
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}
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