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LeetCode 503: Next Greater Element II 🔥 Monotonic Stack + Circular Array Trick | MAANG Preparation

In this video, we’ll solve LeetCode 503 – Next Greater Element II, a classic monotonic stack problem where you’re given a circular array and must find the next greater element for each element.

This is a high-frequency interview question at Amazon, Google, Meta, Microsoft, Apple, and Goldman Sachs. It tests your mastery of the monotonic stack pattern, which is critical for cracking MAANG/MANG interviews.

What you’ll learn in this video:

📖 Problem breakdown with simple examples
❌ Why brute force O(N²) fails in interviews
⚡ Monotonic Stack technique to solve in O(N)
🔁 Handling the circular array trick (2N iteration)
🐞 Edge cases: all decreasing, duplicates, single element
🏆 Clean, optimal solution with dry runs and code walkthrough
🔑 How to confidently explain the monotonic stack in interviews

📌 This is part of the Monotonic Stack Interview Series, following LeetCode 84 (Largest Rectangle in Histogram) and LeetCode 402 (Remove K Digits). Mastering it will give you confidence in solving many other array + stack interview problems.

🔥 If you’re targeting MAANG/MANG roles, this is one of those must-know patterns that interviewers love asking.

👉 If this video helps, Like, Subscribe, and Share — let’s aim for 1 Million views 🚀