提出 #9851294

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ソースコード 拡げる

fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    println!("{}", max_acgt_len(s.as_str()))
}

fn max_acgt_len(s: &str) -> i32 {
    fn inner(rest: &mut std::str::Chars, current: i32, max: i32) -> i32 {
        let head = match rest.next() {
            Some(head) => head,
            None => return max,
        };

        match "ACGT".find(head) {
            Some(_) => {
                let next = current + 1;
                inner(rest, next, if max > next { max } else { next })
            },
            None => inner(rest, 0, max),
        }
    }

    inner(&mut s.chars(), 0, 0)
}

提出情報

ジャッジ結果