~cpp
#include <iostream>
using namespace std;
#include <vector>
#include <numeric>
int num, i, temp1;
double temp_max,temp_min;
vector<double> test;
void process()
{
cout.setf(ios::fixed, ios::floatfield);
cout.setf(ios::showpoint);
cout.precision(2);
double max=0.0, min=0.0;
num = int(accumulate(test.begin(),test.end(),0.0)/test.size()*1000);
temp_max = double((num + 10)/10)/100;
temp_min = double((num)/10)/100;
if(num % 10 == 0)
temp_max = temp_min;
for(i = 0; i < test.size(); i++)
{
if(test[i] > temp_max)
{
max += test[i] - temp_max;
}
else if( test[i] < temp_min)
{
min += temp_min - test[i];
}
}
if(min > max)
max = min;
cout << "$" << max << endl;
}
int main()
{
cin >> num;
while(num)
{
for(i = 0; i <num; i++)
{
cin >> temp_max;
test.push_back(temp_max);
}
process();
test.clear();
cin >> num;
}
return 0;
}