The Trip/곽세환

~cpp 
#include <iostream>
using namespace std;

int main()
{
	int n;				// ������ ���
	int student[1000];	// ������������ ��������� ���
	int total;			// ������
	int aver;			// ���균
	int studentExchanged[1000];	// 공������게 ��������� ������ ������������ ��� ���
	int exchange;		// ������ ������������ ���
	int temp;
	int i, j;
	while (cin >> n && n != 0)
	{
		total = 0.0;
		exchange = 0.0;
		temp = 0.0;
		for (i = 0; i < n; i++)
		{
			double input;
			cin >> input;
			student[i] = (input + 0.005) * 100;
			total += student[i];
		}
		aver = total / n;
		for (i = 0; i < n; i++)
		{
			if (student[i] != aver)
				temp += student[i] - aver;
			studentExchanged[i] = aver;
		}
		for (i = 0; temp >= 1 && i < n; i++)
		{
			if (studentExchanged[i] == aver)
			{
				studentExchanged[i] = aver + 1;
				temp -= 1;
			}

		}

		// ������
		for (i = 0; i < n - 1; i++)
			for (j = i + 1; j < n; j++)
			{
				if (student[i] > student[j])
				{
					int temp;
					temp = student[i];
					student[i] = student[j];
					student[j] = temp;
				}
				if (studentExchanged[i] > studentExchanged[j])
				{
					int temp;
					temp = studentExchanged[i];
					studentExchanged[i] = studentExchanged[j];
					studentExchanged[j] = temp;
				}

			}
		

		for (i = 0; i < n; i++)
		{
			if (studentExchanged[i] > student[i])
			{
				exchange += studentExchanged[i] - student[i];
			}
		}
	
		cout.setf(ios::fixed);
		cout.precision(2);
		cout << "$" << (exchange / 100.0) << endl;
		
	}
	
	return 0;
}