Maximum Twin Sum | The Mirror-Pair Trick | LeetCode 75 #32

Maximum Twin Sum of a Linked List — LeetCode 2130 (Medium), explained in Hindi. Every node has a twin: node i pairs with node n-1-i — the mirror position. In [5,4,2,1], the twins are (5,1) and (4,2), so the answer is 6. The trick: find the middle with slow/fast pointers, reverse the second half — and suddenly every twin is standing right next to its partner. Then zipper-walk both halves, tracking the max twin sum. O(n) time, O(1) extra space. In this video: What a "twin" really is (the mirror, not the neighbor) WHY reversing the second half works (with proof) WHERE the middle is — and why n is always even Full animated dry run, C++ code with every line explained, correctness proof, 10 edge cases, interview Q&A Problem link: https://leetcode.com/problems/maximum... #LeetCode75 #DSAinHindi #LinkedList #CodingInterview #Placements #Cpp #DataStructures