https://atcoder.jp/contests/abc274/tasks/abc274_cただのDPですね。 // Ameba #![allow(non_snake_case)] fn read<T: std::str::FromStr>() -> T { let mut line = String::new(); std::io::stdin().read_line(&mut line).ok(); line.trim().parse().ok().unwrap() } fn read_vec<T: std::str::FromStr></t:></t:>…