LeetCode 31 Next Permutation Explained | Arrays, Greedy & Two Pointers

In this video, we solve LeetCode 31: Next Permutation step by step. This problem teaches one of the most important array patterns in DSA: how to make the smallest possible change to get the next bigger arrangement. We first understand the problem, then figure out the hints, find the pivot, swap it with the next greater element, reverse the suffix, write the pseudocode, code the solution, dry run examples, test cases, and finally submit it. Concepts covered: Arrays Permutations Lexicographical order Greedy thinking Right-to-left traversal Two-pointer reversal In-place algorithm Final complexity: Time: O(n) Space: O(1) If you are preparing for coding interviews or learning DSA through LeetCode, this problem is a must-watch. #DSA #LeetCode #CodingInterview #Arrays #CoinsLive