/************************************************************/
/*                                                          */
/* 2003³â 6¿ù 19ÀÏ                                          */
/* Accelerated C++, 97p ¿¹Á¦ ¼Ò½º                           */
/*                                                          */
/************************************************************/

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

using std::cin;                using std::sort;
using std::cout;               using std::streamsize;
using std::endl;               using std::string;
using std::setprecision;       using std::vector;

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

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

	cout << "Enter all you homework grades, "
		"followed by end-of-file : ";
	double x;
	vector<double> homework;

	while (cin >> x)
		homework.push_back(x);

	typedef vector<double>::size_type::vec_sz;
	vec_sz size = homework.size();
	if (size == 0) {
		cout << endl << "You must enter your grades. "
			"Please try again. " << endl;
		return 1;
	}

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

	vec_sz mid = size/2;
	double median;
	median = size % 2 == 0 ? (homework[mid] + homework[mid+1]) / 2 : homework[mid];

	streamsize prec = cout.precision();
	cout << "Your final grade is " << setprecision(3)
		<< 0.2 * midterm + 0.4 * final + 0.4 * median
		<< setprecision(prec) << endl;

	return 0;
}