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 = 0; 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);
	}
}