Codeforces Round #693 (Div. 3) ABCD 题解 Codeforces Round #693 (Div. 3) <---比赛网址在这 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 A. Cards for Friends B. Fair Division C. Long Junps D. Even-Odd Game END