SOMETHING

public class Main
{
    public static void main()
    {
        int sum = 0;
        for (int i = 0; i < 1000; i+=3)
        {
            sum += i;
        }
        for (int i = 0; i < 1000; i+=5)
        {
            sum += i;
        }
        for (int i = 0; i < 1000; i+= 15)
        {
            sum -= i;
        }
        System.out.println("Answer: " + sum);
    }
}