import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long max = scan.nextLong();
		String fizzBuzzStr = "";
		for(long i = 1; i <= max; i++){
			if(i % 3 == 0 && i % 5 == 0){
				fizzBuzzStr += "FizzBuzz";
			}else if(i % 3 == 0){
				fizzBuzzStr += "Fizz";
			}else if(i % 5 == 0){
				fizzBuzzStr += "Buzz";
			}else{
				fizzBuzzStr += i;
			}
		}

		char[] fizzBuzzStr_Char = fizzBuzzStr.toCharArray();
		int zCount = 0;

		for(int i = 0; i < fizzBuzzStr.length(); i++){
			if(fizzBuzzStr_Char[i] == 'z') zCount++;
		}

		System.out.println(zCount);
		scan.close();
	}

}