Problem Tags

dp
74
data structures
61
O2优化
49
math
43
greedy
38
constructive algorithms
31
trees
27
graphs
26
各省省选
25
动态规划
23
dfs and similar
22
implementation
22
线段树
21
combinatorics
19
probabilities
18
2014
17
bitmasks
17
2022
16
数学
16
数论
16