#include<bits/stdc++.h>
using namespace std;
int main()
{
	double x;
	cin>>x;
	int ans;
	if(x-int(x)>=0.5)
	{
		ans=int(x)+1;
	}
	else
	{
		ans=int(x);
	}
	cout<<ans;
    return 0;
}