import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        int N = Integer.parseInt(bf.readLine());
        int ans = N;
        for (int i = 2; i <= N; ++i) {                        // 从2开始
            if (0 != i % 2 && 0 != i % 3 && 0 != i % 5) {    // 不是2,3,5的倍数
                ans -= 1;                                    // 个数减1
            }
        }
        System.out.println(ans);
    }
}