Скачать или смотреть GFG POTD Sum of subarray minimum 09/07/25 | DSA | JAVA | C++

🔥 In this video, we’ll learn how to solve the *Sum of Subarray Minimums* problem using a powerful trick with a *Monotonic Stack* — all in *Hindi* and from scratch!

📌 Problem: Given an array of positive integers, find the sum of the minimum of all possible subarrays.
We’ll flip the approach: instead of going subarray-wise, we’ll go *element-wise* and count how many subarrays each element is the *minimum* in.

✅ What you'll learn:
Intuition behind the optimal O(n) solution
What is a Monotonic Stack?
How to find Previous and Next Smaller Elements efficiently
Dry run and logic explained with examples (in Hindi)
Why we use increasing stack and not decreasing

📚 This is a must-know problem for coding interviews in top companies like Amazon, Google, Flipkart, etc.

👨‍💻 Code Language: Java
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📲 DM me on Instagram if you want the code/resources!

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