LeetCode 1536 | Minimum Swaps to Arrange Binary Grid 🔥| Greedy + Bubble Simulation | O(N²) Explained

Описание: In today’s LeetCode POTD, we solve:

1536. Minimum Swaps to Arrange a Binary Grid (Medium)
Solution: https://leetcode.com/problems/minimum...

We are given an n × n binary grid and allowed to swap only adjacent rows.
Our goal is to make the grid valid such that all elements above the main diagonal are 0.

In this video, we cover:

✔️ Problem intuition
✔️ Key observation (Trailing zeros trick)
✔️ Why Greedy works here
✔️ Bubble-up swap simulation
✔️ When to return -1
✔️ Full Java implementation
✔️ Time & Space Complexity analysis

This problem is a great example of:
• Greedy Strategy
• Matrix manipulation
• Pattern recognition
• Simulation technique

Time Complexity: O(N²)
Space Complexity: O(N)

Perfect for:
• Coding interviews
• FAANG prep
• Medium-level DSA practice

If you’re preparing for product-based companies, this is a must-understand pattern.
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