public class Multiples {
	public static void main (String[] args) {
		int sum = 0;
		for (int i = 0; i < 1000; i++) {
			if (i % 3 == 0) {
				sum += i;
			}
			else if (i % 5 == 0) {
				sum += i;
			}
		}
		System.out.println(sum);
	}
}