Solve these 16 problem solving patterns to learn enough DSA

1. Sliding window pattern.
2. Two pointer pattern.
3. Fast & slow pointers pattern.
4. Merger interval pattern.
5. Cyclic sort pattern.
6. In-place reversal of linked list pattern.
7. Tree breadth first search pattern.
8. Depth first search DFS pattern.
9. Two heap pattern.
10. Subsets pattern.
11. Modified binary search pattern.
12. Bitwise xor pattern.
13. Top 'K' elements pattern.
14. K-way merge pattern.
15. 0/1 knapsack DP pattern.
16. Topological sort Graph pattern.