public class Test {
public static void main(String[] args) {
	int[] array= {1,2,4,6};

	System.out.println(array(array));
}
public static int array(int[] array) {
	double sum=0;
	for(int x:array) {
		if(x%2==0) {
			sum++;
		}
	}
	return (int) Math.pow((int)2, sum)-1;
}


}