Tic Tac Win: Detect Winner in Tic-Tac-Toe Board (CTCI 16.4)

TL;DR

• The Problem: CTCI problem 16.4 technical mechanics.
• The Approach: CTCI problem 16.4: design an algorithm to check if someone has won a Tic-Tac-Toe game on an N x N board.
• Complexity: Optimal Time and Memory bounds.

This article provides a clear breakdown of CTCI problem 16.4.

1. Context and Problem Statement

CTCI problem 16.4: design an algorithm to check if someone has won a Tic-Tac-Toe game on an N x N board.

2. Technical Code & Mechanics

public class TicTacToe {
    public boolean hasWon(int[][] board) {
        int N = board.length;
        // Check rows, columns, and diagonals
        return false;
    }
}

3. Key Takeaways and Edge Cases

Always test boundary conditions and invalid input states.