Problem Tags

dp
34
math
29
data structures
28
O2优化
22
greedy
16
combinatorics
14
线段树
13
number theory
13
implementation
12
dfs and similar
11
graphs
11
probabilities
11
动态规划
11
constructive algorithms
10
brute force
10
各省省选
10
2022
9
trees
8
bitmasks
8
2020
7