LeetCode 1822 | Sign of the Product of an Array | C++ Solution Explained

In this video, I solve LeetCode Problem 1822: "Sign of the Product of an Array" using a simple and efficient counting approach in C++.
The problem asks us to determine whether the product of all elements in the array is positive, negative, or zero — without actually multiplying large numbers together.

🧠 Approach Used:
Instead of calculating the full product, we only track:

✔️ If any element is 0 → answer becomes 0 immediately
✔️ Count how many negative numbers exist
✔️ If negative count is even → product is positive
✔️ If negative count is odd → product is negative

Example:
[-1,-2,-3,-4,3,2,1] → 1
[1,5,0,2,-3] → 0

This approach avoids overflow issues and works very efficiently.

✅ Time Complexity: O(n)
✅ Space Complexity: O(1)

⏱️ Timeline:
00:00 Introduction
00:18 Problem Statement
00:45 Understanding Product Sign
01:15 Counting Negative Numbers
02:00 C++ Code Explanation
02:45 Complexity Analysis
03:00 Conclusion

💻 Language:
C++

🎯 Problem Link:
https://leetcode.com/problems/sign-of-the-product-of-an-array/

🌐 Connect With Me:

💼 LinkedIn: https://www.linkedin.com/in/harshitpandya2911/
🐙 GitHub: https://github.com/harshitpandya-cg/LeetCode-Solutions/tree/main/1822-sign-of-the-product-of-an-array
🐦 Twitter/X: https://x.com/HarshitP68223

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Видео LeetCode 1822 | Sign of the Product of an Array | C++ Solution Explained канала Harshit Pandya