09-29 LeetCode 658. Find K Closest Elements 4 Approaches: Two Pointers, Sorting, Priority Queue and Binary Search
09-28 LeetCode 19. Remove Nth Node From End of List 3 Approaches: Brute Force, Stack, Slow Fast Pointers with Animation
09-18 LeetCode 42. Trapping Rain Water From Brute Force to DP to Two Pointers with Detail Explaination