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