using System;
public class Program
{
public static void Main()
Console.WriteLine(SumOfXOrY(3,5,1000));
Console.WriteLine("Hello World");
}
public static int SumOfXOrY(int x, int y, int max) {
int sum = 0;
for(int i = 1; i < max; ++i) {
if(i % x == 0 || i % y == 0)
sum += i;
return sum;