12-16 Educational Codeforces Round 140 E(meet-in-the-middle,bitmask)F(树链剖分,莫队,根号分治,dsu on tree) 莫队 meet-in-middle bitmask 根号分治 dsu 树链剖分 on tree
11-26 Atcoder abc279 Ex(Pentagonal Number Theorem, 广义二项式定理, Lucas' Theorem) Pentagonal Number Theorem 广义二项式定理 Lucas' Theorem
11-19 Atcoder abc278 G(Grundy's number)Ex(q-analog,stirling,排列组合,stirling反演) 斯特林数 stirling反演 排列组合 Grundy's number q-analog