#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a;
	b=a*1001;
	c=b/7/11/13;
	cout<<c;
}	
/**************************************************************
	Problem: 1961
	User: toughuatao1
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/