Day 6
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use std::fs;
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use anyhow::Result;
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use itertools::Itertools;
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use itertools::FoldWhile::*;
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fn main() -> Result<()> {
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let input = fs::read_to_string("input/06.txt")?;
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let chars: Vec<char> = input
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.chars()
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.collect_vec();
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let answer = chars
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.into_iter()
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.fold_while((1, ' ', ' ', ' '), |(i, f, s, t), c| {
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if f != s && f != t && f != c && s != t && s != c && t != c && f != '' {
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return Done((i, f, s, t));
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}
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return Continue((i + 1, s, t, c));
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}).into_inner().0;
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println!("{answer}");
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return Ok(());
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}
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use std::collections::HashSet;
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use std::collections::VecDeque;
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use std::fs;
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use anyhow::Result;
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use itertools::Itertools;
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use itertools::FoldWhile::*;
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fn main() -> Result<()> {
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let input = fs::read_to_string("input/06.txt")?;
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let chars: Vec<char> = input
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.chars()
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.collect_vec();
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let answer = chars
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.into_iter()
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.fold_while((1, VecDeque::from([' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '])), |(i, mut h), c| {
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if h.iter().collect::<HashSet<&char>>().len() < 14 {
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h.pop_front();
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h.push_back(c);
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return Continue((i + 1, h));
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}
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return Done((i, h));
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}).into_inner().0 - 1;
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println!("{answer}");
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return Ok(());
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}
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