Memory of winter

Memory of winter:

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[CF868E]Policeman and a Tree

[洛谷P1514]引水入城

[洛谷P1494]小Z的袜子

[洛谷P1747]好奇怪的游戏

[洛谷P3379]模板最近公共祖先(LCA)

[洛谷P3384]模板树链剖分

[洛谷P1168]中位数

[洛谷P1196]银河英雄传说

[洛谷P1892]团伙

[NOI 2007]社交网络

[CF999E]Reachability from the Capital

[CF1110E]Magic Stones

[CF1111D]Destroy the Colony

[CF1111E]Tree

[CF1111C]Creative Snap

[SOJ #47]集合并卷积

[CF1103B]Game with modulo

Codeforces Round #536 (Div. 2)

[CF1095F]Make It Connected

[CF1083B]The Fair Nut and Strings

[CF785E]Anton and Permutation