import java.util.*;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int ans = 0;
        for(int i=1;i<=N;i+=2){
            if(helper(i)==8) ans++;
        }
        System.out.println(ans);
    }
    public static int helper(int N){
        int up = (int) Math.floor(Math.sqrt(N));
        int cnt=2;
        for(int i=2;i<=N-1;i++){
            if(N%i==0) cnt++;
        }
        return cnt;
    }
}

/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