题目标签

math
19
greedy
16
dfs and similar
14
constructive algorithms
12
graphs
12
data structures
11
combinatorics
10
dp
9
implementation
7
trees
7
sortings
7
brute force
7
*2200
6
*2100
6
*800
6
number theory
6
strings
5
*2300
5
bitmasks
4
*2000
4