#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
    int a;
    double b,c;
    cin>>a;
    switch(a)
    {
        case 1:
        {
            cin>>b;
            if(b>0)
            {
            c=(b*(9/5))+32;
            cout<<fixed<<setprecision(2)<c;
            }
            else
            {
              cout<<"Invalid input";  
            }
            break;
        }
        case 2:
        {
            if(b>0)
            {
            cin>>b;
            c=((b-32)*5)/9;
            cout<<c;
            }
            else
            {
              cout<<"Invalid input";  
            }
            break;
        }
        default:
        {
            cout<<"Invalid input";
        }
    }
}