题目标签

greedy
15
math
13
constructive algorithms
10
sortings
9
dp
9
brute force
7
implementation
7
data structures
6
trees
4
strings
3
combinatorics
3
number theory
3
binary search
3
*2000
3
*800
3
bitmasks
3
搜索
2
二分
2
stl
2
dfs and similar
2