nclude<iostream>
usi#ng namespace std;
int main(){
    int c;
    double f;
    cin>>c;
    f=9.0/5*c+32;
    cout<<fixed<<setprecision(2)<<f<<endl;
    return 0;
}
/**************************************************************
	Problem: 1031
	User: chenmingyu
	Language: C++
	Result: Compile Error
****************************************************************/