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

using namespace std;

int main ()
{
	cout << "Enter your first name: ";
	string name;
	cin >> name;
	cout << "Hello, " << name << "!" << endl;

	cout << "Enter your midterm and final exam grades: ";
	double midterm, final;
	cin >> midterm >> final;

	cout << "Enter all your homework grades, followed by end-of-file: ";
	vector<double> homework;
	double x;
	while (cin >> x) homework.push_back(x);

	if(homework.size() == 0)
	{
		cout << endl << "You must enter your grades, please try again." << endl;
		return 1; // exit program with error
	}

	sort(homework.begin(), homework.end());

	unsigned int mid = homework.size() / 2;
	
	// if there's an odd number of homework grades, take the middle one.
	// if there's an even number of homework grades, take the average of the two middle ones.
	double median = ((homework.size() % 2) ? homework[mid] : (homework[mid] + homework[mid - 1]) / 2);

	double grade = (0.2 + midterm) + (0.4 * final) + (0.4 * median);
	
	printf("%3f", grade);
	
	return 0; // exit program
}