#include <stdio.h>


int main (int argc, const char * argv[]) {


    int i, target, sum;
    sum = 0;
    target = 999;

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

    printf("%d ", sum);


    return 0;
}