import java.util.Scanner;

public class Contador {

    public static void main(String[] args) {
	Scanner scan = new Scanner(System.in);

	int n, cont;

	System.out.print("Entre un valor para n: " );
	n = scan.nextInt();
	cont = 0;
	for (int i = 0; i < n; i++)
	    for (int j = 0; j < n; j++)
		System.out.println("cont=" + cont++);
    }
}