Master Binary Search with Duplicates: LeetCode 154 Explained | InfoTechiezz DSA

Welcome to InfoTechiezz! 🚀 In this video, we solve LeetCode 154: Find Minimum in Rotated Sorted Array II using C++. This Hard problem extends Binary Search to handle duplicates. Learn how to find the minimum element efficiently even when the array contains repeated values.

We break down the logic step-by-step, from problem understanding to optimized coding. Master the modified Binary Search technique required for rotated arrays with duplicates. Perfect for intermediate coders prepping for FAANG interviews. We focus on writing clean, efficient C++ code handling edge cases.

⏱️ Timestamps:
0:00 Intro & Welcome
0:26 What is the Question?
3:10 Binary Search Explanation
5:00 Pseudo Code Explanation
12:30 Coding Part (C++)
14:45 Outro & Next Steps
🔗 Resources:
Problem: https://leetcode.com/problems/find-minimum-in-rotated-sorted-array-ii/

🔑 Key Concepts:
Modified Binary Search
Handling Duplicates (nums[left] == nums[mid])
Time Complexity: O(log n) average, O(n) worst
Space Complexity: O(1)
Rotated Sorted Array Logic
⚠️ Common Mistakes:
Ignoring duplicate edge cases
Standard Binary Search failure
Infinite loops in pointer updates
Missing base cases for small arrays

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