#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
	double r;
	cin >> r;
	cout << fixed << setprecision(12) << r << endl;
	return 0;
}

#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
	double r;
	cin >> r;
	cout << fixed << setprecision(12) << r << endl;
	return 0;
}

#include <iostream>
#include <iomanip>
using namespace std;
double n;
int main(){
	cin>>n;
	cout<<fixed<<setprecision(12)<<n;
	return 0;
}