#atcoder おつかれさん
#atcoder C: https://atcoder.jp/contests/abc161/submissions/11531033B: https://atcoder.jp/contests/abc161/submissions/11524576A: https://atcoder.jp/contests/abc161/submissions/11517021
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#atcoder
C: https://atcoder.jp/contests/abc161/submissions/11531033
B: https://atcoder.jp/contests/abc161/submissions/11524576
A: https://atcoder.jp/contests/abc161/submissions/11517021