#include<bits/stdc++.h>
using namespace std;
int main(){
   int n,h,j=0;
   cin>>n;
   for(h=1;h<=n;h++){
   	   h=n%3;
   	   h=n%5;
   	   h=n%7;
   	   if(n%3==2&&n%5==3&&n%7==2){
   	   	     j++ ;
		  }
   	  
   	   
   	
   }
    
       
     
}
/**************************************************************
	Problem: 1055
	User: jiangyuanfeng
	Language: C++
	Result: Time Limit Exceed
****************************************************************/