Number of Ways Where Square = Product | LeetCode 1577 | HashMap + Math Logic

In this video, we’ll solve the LeetCode #1577 – Number of Ways Where Square of a Number Equals Product of Two Numbers using HashMap (defaultdict) in Python 🐍.

You’ll learn how to combine mathematical reasoning with hash-based counting to efficiently count valid triplets between two arrays.

💡 Concept Covered:

HashMap-based frequency counting

Avoiding nested loops with smart counting

How to relate a² = b × c in both array directions

Step-by-step dry run and visualization
📦 Summary:
➡️ Smart use of HashMap avoids brute-force triplet checking
➡️ Works symmetrically across both arrays
➡️ Mathematical pattern + frequency counting = powerful combo ⚡

📌 GitHub Repository (Code + Notes):
👉 https://github.com/dearnidhi/Mastering-Dsa-Python

📩 Contact:
✉️ Email: nidhiyachouhan99@gmail.com

📸 Instagram: @codenidhi

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Видео Number of Ways Where Square = Product | LeetCode 1577 | HashMap + Math Logic канала Nidhi Chouhan