LeetCode 289: Game of Life | Java Solution | In-place Array Manipulation

In this video, I solve the Game of Life problem using #inplace array manipulation without extra space. The optimal solution achieves O(m×n) time complexity and O(1) space complexity by using bit manipulation to track state changes. #leetcode #gameoflife #arrays ## ⏱️ Timestamps 00:00 - Understanding the problem statement 02:10 - Brute force approach 02:53 - Optimal solution 05:02 - Big O Notation explained 05:39 - Java solution walk-through 06:53 - Solution analysis - runtime + memory 07:01 - Conclusion ## 🔑 Key Concepts - Cellular automaton simulation - In-place array manipulation - Bit manipulation for state tracking - 2D array traversal and neighbor counting - State transition management ## 📚 Learning Points - How to modify arrays in-place when you need to preserve original values - Techniques for encoding multiple states in a single value - Efficient neighbor counting in grid-based problems - Converting multi-state problems into binary state management ## 🔄 Related Problems - LeetCode 73: Set Matrix Zeroes - LeetCode 54: Spiral Matrix - LeetCode 348: Design Tic-Tac-Toe - LeetCode 723: Candy Crush ## 👥 Target Audience This video is for intermediate-level coders preparing for technical interviews at top tech companies. #codinginterview #faang ## 📋 Prerequisites - Basic understanding of arrays and 2D matrices - Familiarity with bit manipulation concepts - Knowledge of Java syntax and array operations ## 🔗 Links - LeetCode problem: https://leetcode.com/problems/game-of-life/ - Solution code: https://leetcode.com/problems/game-of-life/solutions/7045800/matrix-manipulation-solution-in-java-wit-0s21 ## 💡 Additional Tips - Pay attention to handling cells at the grid boundaries - Remember that Conway's Game of Life has important applications in computer science and mathematics - This problem tests your ability to think creatively about state management ## 🙏 Call to Action Did this solution help you understand in-place array manipulation better? Hit subscribe and turn on notifications for more interview preparation videos! Share your alternative approaches or questions in the comments below.