31 lines
693 B
Rust
31 lines
693 B
Rust
use aoc_runner_derive::{aoc as aoc_run, aoc_generator};
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use std::collections::HashSet;
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type Beep = HashSet<char>;
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#[aoc_generator(day6)]
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fn parse_input_day1(input: &str) -> String {
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input.to_string()
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}
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#[aoc_run(day6, part1)]
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fn part1(input: &str) -> usize {
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get_token(input.trim(), 4)
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}
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#[aoc_run(day6, part2)]
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fn part2(input: &str) -> usize {
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get_token(input.trim(), 14)
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}
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fn get_token(input: &str, len: usize) -> usize {
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let mut out = 0;
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for (i, c) in input.as_bytes().windows(len).enumerate() {
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let window = Beep::from_iter(c.iter().map(|c| *c as char));
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out = i + len;
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if window.len() == len {
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break;
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}
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}
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out
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}
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