Tic Tac Toe Validator

Medium Mini Projects & Algorithmic Challenges

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Problem Statement

Write a C++ program checking a 3×3 Tic Tac Toe grid for a winning condition (‘X’ or ‘O’).

Input Format

A 3x3 character matrix representing the board state.

Output Format

Print 'X Wins', 'O Wins', or 'Ongoing'.

Constraints

Grid elements are 'X', 'O', or '.'

Sample Input

X X X
. O .
. O .

Sample Output

X Wins

Explanation

Evaluates rows, columns, and diagonals for matching symbols.

Starter Code

#include <iostream>
#include <vector>

int main() {
    char grid[3][3];
    bool ok = true;
    for(int i=0; i<3; i++) {
        for(int j=0; j<3; j++) {
            if(!(std::cin >> grid[i][j])) ok = false;
        }
    }
    if(ok) {
        // Write your tic tac toe validator logic here
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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