Problem Tags

dp
48
math
37
O2优化
35
data structures
32
greedy
23
combinatorics
18
constructive algorithms
17
动态规划
16
graphs
15
probabilities
15
线段树
14
dfs and similar
14
implementation
14
bitmasks
14
各省省选
14
number theory
13
数论
12
trees
12
数学
11
brute force
10