Скачать или смотреть LeetCode Daily Challenge - Problem 1128: Number of Equivalent Domino Pairs | MannSeCoding

Welcome to today’s LeetCode Daily Challenge!
In this video, we’ll solve LeetCode Problem 1128 - Number of Equivalent Domino Pairs with a clear explanation and optimized approach.

This problem tests your understanding of array manipulation, hash maps, and mathematical combinations. We’ll start with a brute-force method and quickly move to an efficient solution using hashing.

🚀 What You'll Learn:

How to represent domino pairs consistently

Using a frequency map for counting

Applying nC2 formula for counting equivalent pairs

📌 Problem Tag: Easy
👨‍💻 Languages Used: Python / Java (choose based on your video)
🧠 Core Concepts: Arrays, Hashing, Combinatorics

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