package yukicoder;

import java.util.ArrayList;
import java.util.Scanner;

public class Yuki311 {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);
		int num = scan.nextInt();
		scan.close();
		int ans = 0;
		ArrayList<String> arrayList = new ArrayList<String>();
		for (int i = 1; i <= num; i++) {

			if (i % 3 == 0 && i % 5 == 0) {
				arrayList.add("FizzBuzz");
			} else if (i % 3 == 0) {
				arrayList.add("Fizz");
			} else if (i % 5 == 0) {
				arrayList.add("Buzz");
			} else {

			}
		}

		for (String char_z : arrayList) {
			for (int i = 0; i < char_z.length(); i++) {
				if ('z' == char_z.charAt(i)) {
					ans++;
				}
			}
		}
		System.out.println(ans);
	}
}