DSA problem

1. Maximum and minimum of an array using minimum number of comparisons
2. Reverse the array
3. Maximum Subarray Sum
4. Contains Duplicate
5. Chocolate Distribution Problem
6. Search in Rotated Sorted Array
7. Next Permutation
8. Best time to Buy and Sell Stock
9. Repeating and Missing Number
10. kth Largest element in an Array
11. kth Smallest element in an Array
12. Trapping rain water
13. Product of Array Except Self
14. Find Minimum in Rotated Sorted Array
15. Three Sum
16. Container with Most water
17. Merge Overlapping Intervals
18. Minimum merge operation to make array palindrome
19. Median of two Sorted Array
20. First Missing Positive
21. Decode Ways
22. Merge K Sorted Lists
23. Longest Palindromic Substring