#include <iostream>
using namespace std;
bool rszf (double n)
{
	bool ans;
	if (n>=0)	ans = 1;
	else	ans = 0;
	return ans;
}
int main ()
{
	bool zf;
	double r;
	cin >> r;
	zf = rszf (r);
	if (zf == 1)	r = int (r);
	else
	{
		r = int (r);
		r++;
	}
	cout << r;
}