Codeforces Round #693 (Div. 3) ABCD 题解

Codeforces Round #693 (Div. 3) <---比赛网址在这

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感谢王俊越提供的A、B、D题！！

我这个蒟蒻写的C题就不感谢了qwq

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A. Cards for Friends

B. Fair Division

C. Long Junps

D. Even-Odd Game

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