Next Greater Element II (Circular Array) | Brute Force + Monotonic Stack | Python, C++, Java
In this video, we solve Next Greater Element II, where the array is circular.
We begin with the brute force approach to understand how circular traversal works, and then move to the optimized monotonic stack solution to handle the problem efficiently in linear time.
You will learn:
What makes this problem circular
How to simulate circular traversal using modulo
Brute force approach and its limitations
Optimized solution using monotonic decreasing stack
Why we traverse the array twice (2N)
How to use % n to wrap around
Time complexity and amortized analysis
Clean and interview-ready code in Python, C++, and Java
This problem is a very important extension of Next Greater Element and helps in mastering circular array patterns and stack-based optimizations.
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