打算做 50 道 CF 的题目，并会附上题解。

双向BFS+逆元
(Updated on 2021/3/9)

点双连通分量+圆方树+树链剖分+splay
(Updated on 2021/4/16)

线性筛质数+DP
(Updated on 2021/4/17)

树上倍增+LCA
(Updated on 2021/4/19)

线段树+最短路
(Updated on 2021/5/15)

splay+DP
(Updated on 2021/5/25)

二分
(Updated on 2021/6/17)

链表+并查集
(Updated on 2021/7/8)

splay
(Updated on 2021/7/12)

LCA+最小生成树
(Updated on 2021/7/20)

线段树+二分
(Updated on 2021/7/20)