#include <iostream>
using namespace std;
int main()
{
int number = 0 , counter = 0 , sum = 0 , tester3, tester5;
for(number = 0; number < 1000; number++)
{
tester3 = number % 3;
tester5 = number % 5;
if (tester3 == 0 || tester5 == 0)
{
sum += counter + number;
}
}
cout<<sum;
cin.get();
return 0;
}
