import java.util.*;
import java.io.*;

public class Main {
    public static int count(int k){
        int ans = 0;
        for(int i=1;i*i<=k;i++){
        	if(k%i==0){
        	    if(i*i==k) ans+=1;
        	    else ans+=2;
        	}
        }
        return ans;
    }
    public static int solve(int N){
        int ans = 0;
        for(int i=1;i<=N;i++){
        	if(i%2!=0 && count(i)==8)ans++;
        }
        return ans;
    }
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        System.out.println(solve(N));
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz