import java.util.Scanner;

public class Fizzbuzz {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int threeAndFive = koubaisuu(5, 3);
		StringBuilder sb = new StringBuilder();
		for (int i = 1; i <= N; i++) {
			if (i % threeAndFive == 0) {
				sb.append("FizzBuzz");
			} else if (i % 3 == 0) {
				sb.append("Fizz");
			} else if (i % 5 == 0) {
				sb.append("Buzz");
			}
		}
		int count = 0;
		for (int i = 0; i < sb.length(); i++) {
			if (sb.charAt(i) == 'z') {
				count++;
			}
		}
		System.out.println(count);

	}

	// 最大公約数もとめてれる
	private static int saidai(int a, int b) {
		int r;
		while ((r = a % b) != 0) {
			a = b;
			b = r;
		}
		return b;
	}

	//最小公倍数
	private static int koubaisuu(int a ,int b) {
		int gcd = getGCD(a, b);
		return a * b /gcd;
	}
	//最大公倍数
	private static int getGCD(int m, int n) {
		return n == 0 ? m : getGCD(n, m % n);
		}
}