例题

例题1https://codeforces.com/problemset/problem/1175/Fhttps://codeforces.com/problemset/problem/1175/F

例题2https://codeforces.com/contest/2014/problem/Hhttps://codeforces.com/contest/2014/problem/H例题4https://codeforces.com/contest/1418/problem/Ghttps://codeforces.com/contest/1418/problem/G例题5https://atcoder.jp/contests/abc250/tasks/abc250_ehttps://atcoder.jp/contests/abc250/tasks/abc250_e