题目标签

constructive algorithms
5
greedy
5
trees
5
dfs and similar
3
brute force
3
binary search
2
graphs
2
implementation
2
dp
2
data structures
2
dsu
2
*2400
1
math
1
*2100
1
*2000
1
*1700
1
combinatorics
1
*1900
1
*2300
1
*1500
1