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
08-06 Atcoder abc220 G(计算几何,排序,自定义排序)H(FWHT,FWT,meet-in-middle,bitmask) FWT 计算几何 bitset meet-in-middle
07-02 Codeforces Round 803 F(数学,数组,相邻无序对)G(GF(2),meet in middle,不懂证明) 数学 TODO 冒泡排序 GF(2) meet-in-middle