import java.util.*;
import static java.lang.System.*;
import static java.lang.Math.*;
public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(in);
int ans=0;
    int n = Integer.parseInt(sc.next());
    for (int i = 1; i <= n; i++) {
        if(i%2!=0){
        int count=0;
        for (int j = 1; j <= i; j++) {
            if(i%j==0)count++;
        }
        if(count==8)ans++;
        }
    }
    out.println(ans);
}}
/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