题目标签

greedy
13
math
9
constructive algorithms
8
sortings
8
dp
7
data structures
5
brute force
4
implementation
3
*800
3
dfs and similar
2
2-sat
2
matrices
2
combinatorics
2
number theory
2
binary search
2
trees
2
*1100
2
bitmasks
2
strings
2
贪心
1