import java.util.Random;

public class hashTester {

	public static void main(String[] args) {
		int[][] array = generator();
		int[] hash = new int[array.length];

		for (int i=0; i<hash.length; i++) {
			hash[i] = 17*array[i][0] + 31*array[i][1];
			System.out.println(i+". "+array[i][0]+" and "+array[i][1]+" = "+hash[i]);
		}
	}

	public static int[][] generator() {
		Random r1 = new Random();
		int p = 30;
		int[][] array = new int[p][2];
		for (int i=0; i<p; i++) {
			for (int w=0; w<2; w++) {
				array[i][w] = (int)r1.nextInt(2);
			}
		}
		return array;
	}
}