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++);
}
}
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