Envío 4361

Código

import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[][] numberArray = new int[N][N];
		int[] rowSum = new int[N];
		int[] columnSum = new int[N];
		int diagSum = 0;
		int diag2Sum = 0;
		for (int row = 0; row < N; row++) {
			for (int col = 0; col < N; col++) {
				numberArray[row][col] = sc.nextInt();
				rowSum[row] += numberArray[row][col];
				columnSum[col] += numberArray[row][col];
				if (row == col) diagSum += numberArray[row][col];
				}
			diag2Sum += numberArray[row][N-1-row];
			}
		
		sc.close();

		if (Arrays.equals(rowSum, columnSum) && rowSum[0] == diagSum && rowSum[0] == diag2Sum) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}