QLU Exercise Contest on Aug 31, 2021 (Chaired by Haoyu Qi) ABCDE题解

比赛链接

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A. Dislike of Threes By 王文正

B. Who's Opposite? By 秦浩源

C. 接水问题 By 李伟杰

D. E-Rise of Shadows By 李振宇

E. [BJOI2019]排兵布阵 By 陈延忠

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