14 lines
395 B
Rust
14 lines
395 B
Rust
use std::collections::HashSet;
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fn main() {
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let line = std::io::stdin().lines().next().unwrap().unwrap();
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let chars: Vec<char> = line.chars().collect();
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for (i, window) in chars.windows(4).enumerate() {
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let set: HashSet<char> = HashSet::from_iter(window.iter().map(|x| *x));
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if set.len() == 4 {
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println!("{}", i + 4);
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return
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}
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}
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}
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