#include <iostream>
//#include <cassert>
using namespace std;
int main() {
	int x;
	cout<<"请输入一个3位的整数"<<endl;
	cin >> x;
    //assert(x >= 100 && x <= 999);
    x = x + x*1000;
	x = x/(7*11*13);
	cout << x << endl;
	return 0;
}