#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
double n;
cin>>n;
cout<<setprecision(2)<<fixed;
cout<<n;
return 0;
}
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
double n;
cin>>n;
cout<<setprecision(2)<<fixed;
cout<<n;
return 0;
}