public class SNums
{
    private int[] nums;
    public SNums(int nNums) { 
	nums = new int[nNums];
	for (int i = 0; i < nNums; i++)
	    nums[i] = nNums*i;
    }
    @Override
    public String toString() {
        return "(" + nums[0] + ", " + nums[nums.length/2] + ", " + nums[nums.length-1] + ")"; 
    }
    public static void main(String[] args) { 
	SNums nums = new SNums(10); 
	System.out.println(nums);
    }
}