Quiz
https://atcoder.jp/contests/abc104/tasks/abc104_d
Submit
https://atcoder.jp/contests/abc104/submissions/4308261
https://atcoder.jp/contests/abc113/tasks/abc113_d
https://atcoder.jp/contests/abc113/submissions/4307703
https://atcoder.jp/contests/abc095/tasks/arc096_b
https://atcoder.jp/contests/abc095/submissions/4307178
https://atcoder.jp/contests/abc118/tasks/abc118_c
https://atcoder.jp/contests/abc118/submissions/4285563
g++ -std=c++11 answer_abc004_4.cpp