revise set

                                               ALGORITHM

             Data structure


4) Segment tree
5) Set

8) Deque
9) Priority_queue
10) Cumulative Sum
11) Disjoint Set Union Find (DSU)
12) trie
13) Sliding Range RMQ
14) policy based data structure
15) Mergesort Tree

18) Next Greater Element
19) Sparse Table

          Searching technique

2) Binary search


              Graph


11)LCA

              DP
1) Coin change
2) LCS
3) LIS
4) 0-1 Knapsack
5) Edit distance
6) bit mask dp
7) Digit DP


            Greedy

1) Activity Selection
2) Knapsack


           String Algorithm
1) Rabin karp
2) String permutation
3) Z Algorithm



           Number Thoery

13) Mat Expo


            Range Query ALgorithm

2) Segment tree