#include <stdio.h>

int main()
{
    unsigned short i;
    unsigned int sum = 0;

        for(i = 0; i < 1000; ++i)
        {
            if(i % 3 == 0 || i % 5 == 0)
            {
                sum = sum + i;
            }
        }

    printf("%d\n", sum);
    getch();
    return 0;
}