#include<bits/stdc++.h>
using namespace std;
int main()
{
	float x;
	cin>>x;
	//floor：向下取整
	//ceil：向上取整 
	if(x>0){
		cout<<floor(x)<<endl;
	}
	else if(x<0){
		cout<<ceil(x)<<endl;
	}
	else{
		cout<<x<<endl;
	}
	return 0;
}