C++ 20分

#include<iostream>
#include<iomanip>
#include<cmath>
using namespace std;
int main()
{
	int n;
	double max = 0.0, min = 1.0e6, sum = 0.0, avg, err = -1.0;
	double x[520];
	cin >> n;
	for (int i = 0; i < n; i++)
	{
		cin >> x[i];
	}
	for (int i = 0; i < n; i++)
	{
		if (x[i] > max)max = x[i];
		if (x[i] < min)min = x[i];
	}
	for (int i = 0; i < n; i++)
	{
		if ((x[i] != max) && (x[i] != min))
			sum = sum + x[i];
	}
	avg = sum / (n - 2);
	for (int i = 0; i < n; i++)
	{
		if ((x[i] != max) && (x[i] != min))
		{
			double a = x[i] - avg;
			if (fabs(a) > err)
				err = fabs(a);
		}
	}
	cout << fixed << setprecision(2) << avg << " ";
	cout << fixed << setprecision(2) << err;
	return 0;
}