Problem Tags

dp
22
math
22
greedy
16
data structures
14
constructive algorithms
13
trees
10
*2100
10
graphs
10
dfs and similar
9
combinatorics
9
*2300
8
sortings
6
bitmasks
6
binary search
5
divide and conquer
5
brute force
5
number theory
5
O2优化
4
*2700
4
*2600
4