162: Find Peak Element | Binary Search on Unsorted Arrays!
Master LeetCode 162 "Find Peak Element" with an intuitive Binary Search approach! 🚀
In this video, Chandrakant breaks down why we use Binary Search even though the array isn't sorted. We'll visualise the array as a mountain range to understand how to "climb" toward a peak in logarithmic time.
Key Concepts Covered:
✅ Understanding the "Peak" definition and constraints.
✅ Why a linear O(n) search isn't enough.
✅ Implementing a O(log n) Binary Search by comparing mid with its neighbour.
✅ Handling edge cases like single-element arrays or peaks at the boundaries.
Timestamps:
[00:00] - Introduction to the problem
[01:06] - Visualising the array as a graph/mountain
[02:42] - Handling equal neighbours & constraints
[06:26] - Transitioning from Linear Search to Binary Search
[07:49] - Step-by-step example walkthrough
[12:41] - Live Coding the solution
[14:32] - Time and Space Complexity analysis
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