Скачать или смотреть Squareful Arrays | C++ Backtracking & Perfect Square Permutations Explained

In this video, we solve the Squareful Arrays problem using C++ backtracking.

A squareful array is an array where the sum of every pair of adjacent elements is a perfect square. We will find all unique permutations of the array that satisfy this condition.

🔹 Problem Highlights:

Input: An integer array nums

Output: Number of permutations where every adjacent sum is a perfect square



We cover:
✔️ Sorting and skipping duplicates to avoid repeated permutations
✔️ Backtracking to generate valid permutations
✔️ Perfect square check optimization
✔️ Step-by-step C++ code explanation

📌 Example:

Input: [1,17,8]
Output: 2
Explanation: Valid permutations: [1,8,17] and [17,8,1]

This video is perfect for coding interview prep, LeetCode practice, and competitive programming enthusiasts.



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