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package ejercicios_matrices_i;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 *
 * @author Javi-PC
 */
public class Ejercicio9 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader (new InputStreamReader(System.in));

        int filas, columnas;
        boolean mayor=false;

        System.out.println("Introduce el número de filas: ");
        filas = Integer.parseInt(br.readLine());
        System.out.println("Introduce el número de columnas: ");
        columnas = Integer.parseInt(br.readLine());

        int [][] matriz = new int [filas][columnas];

        for (int i=0;i<matriz.length;i++) {
            for (int j=0;j<matriz[i].length && mayor==false;j++) {
                if (matriz[i][j]>0) {
                    mayor=true;
                }
            }
        }

        if (mayor==false) {
            System.out.println("Es nula.");
        } else {
            System.out.println("No es nula.");
        }
    }
}