import java.util.*;
import java.util.ArrayList;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int answer = 0;
        int i = 1;
        while(i <= n){
            for(int j = 1; j <= i; j++){
                if(i % j == 0){
                    count++;
                }
            }
            if(count == 8){
                answer++;
            }
            count = 0;
            i = i+2;
        }
        System.out.print(answer);
    }
}
/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