private static boolean arraySub(int[] a, int[] b) {
	        for (int i = 0; i < a.length; i++) {
	            if (b[i] - a[i] > 0) {
	                return true;
	            } else if (b[i] - a[i] < 0) {
	                return false;
	            } else {
	                if(i+1==a.length) {//check is end
	                    return true;
	                }else {
	                    continue;
	                }
	            }
	        }
	        return false;
	    }