#include<iostream>
#include<ios>
#include<iomanip>
#include<string>

using namespace std;

int main()
{
	cout << "Entrer votre nom : ";
	string name;
	cin >> name;
	cout << "Hello, " << name << endl;

	cout << "Entrer votre note de partiel et d'examen: ";
	double midterm, final;
	cin >> midterm>> final;

  int count = 0;
	double sum = 0;

	double x;

	cout << "Entrer vos notes de devoirs terminer par  eof: ";

	while(cin >> x)
	{
		++count;
		sum +=x;
	}

	streamsize prec =  cout.precision();
	cout << "Votre note final est : " << setprecision(4)
			 << 0.2 * midterm + 0.4 * final + 0.4 * sum/count
			 << setprecision(prec) << endl;
}