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[Educational Codeforces Round 36]E. Physical Education Lessons

[BZOJ 2152][Luogu P2634]聪聪可可

[BZOJ 3048][Luogu P3069][USACO2013 Jan]Cow Lineup

[BZOJ 2002][Luogu 3203][HNOI2010]Bounce 弹飞绵羊

[BZOJ 1468][POJ 1741]Tree

[BZOJ 2453]维护队列

[BZOJ 3674]可持久化并查集加强版

[BZOJ 3673]可持久化并查集 by zky

[POJ 2155]Matrix