URI 1117 Solution

#include<iostream>

#include<iomanip>

using namespace std;

int main()

{

    double X,Y;

        do

        {

            cin>>X;

            if(X>10 ||X<0)

            {

                cout<<"nota invalida"<<endl;

            }

        }

        while(X>10 ||X<0);

        do

        {

            cin>>Y;

            if(Y>10 ||Y<0)

            {

                cout<<"nota invalida"<<endl;

            }

        }while(Y>10 ||Y<0);

     cout<<"media = "<<setprecision(3)<<(X+Y)/2<<endl;

    return 0;

}