#include<bits/stdc++.h>
using namespace std;
int main()
{
    double n;
    cin>>n;
    cout<<fixed<<setprecision(3)<<n;
    return 0;
}

#include<bits/stdc++.h> using namespace std; int main() { double f; cin>>f; cout<<fixed<<setprecision(3)<<f; }

#include<bits/stdc++.h> using namespace std; int main(){ double n; cin>>n; cout<<fixed<<setprecision(3)<<n; return 0; }