26 lines
651 B
Rust
26 lines
651 B
Rust
#![warn(clippy::pedantic)]
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use std::io::{stdin, Read};
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fn all_distinct<T: Ord>(slice: &[T]) -> bool {
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slice
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.iter()
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.enumerate()
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.all(|(i, x)| slice[i + 1..].iter().all(|y| y != x))
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}
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fn end_of_first_distinct_run<T: Ord>(data: &[T], len: usize) -> Option<usize> {
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data.windows(len)
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.position(|cs| all_distinct(cs))
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.map(|i| i + len)
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}
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fn main() {
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let mut data = String::new();
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stdin().read_to_string(&mut data).unwrap();
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let data = data.as_bytes();
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println!("{:?}", end_of_first_distinct_run(data, 4).unwrap());
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println!("{:?}", end_of_first_distinct_run(data, 14).unwrap());
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}
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