Two Sum II - Sorted Array Two Pointer Explained Visually | LeetCode 167 | AI/ML Interview Prep

Two Sum II upgrades the classic problem with one constraint: the array is already sorted. That one change unlocks a cleaner O(n) two-pointer approach — no Hash Map needed. Here's the visual breakdown. What you'll learn: ✅ Why sorted input lets you replace Hash Map with two pointers ✅ Decision logic: sum target move right pointer left; sum target → move left pointer right ✅ Visual walkthrough: 2, 7, 11, 15, target = 9 → 1, 2 ✅ Why this is O(n) time and O(1) space ✅ Python implementation with 1-indexed output 🎯 Asked in TCS Research interviews — a clean demonstration of exploiting sorted order, a key pattern in AI/ML data pipeline problems. 🧠 Practice this problem yourself: 👉 https://codedive.in/two-sum-ii 🚀 codedive.in — 207 curated DSA problems for AI/ML engineers. Sorted input. Smarter pointers. ━━━━━━━━━━━━━━━━━━━━━━━━━━ ⏱ Timestamps: 0:00 - Problem Statement 0:30 - Why Not Hash Map Here? 1:00 - Two Pointer Decision Logic 1:45 - Visual Walkthrough 2:15 - Python Code 2:45 - Complexity Analysis ━━━━━━━━━━━━━━━━━━━━━━━━━━ #TwoSumII #LeetCode167 #TwoPointer #SortedArray #TCSResearch #AIMLEngineer #LeetCode #CodingInterview #PythonDSA