int main ()
{
	float a[300];
	int n,i,j,k;
	float average,c;
	float sum=0;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%f",&a[i]);
		sum=sum+a[i];
	}
	for(j=0;j<n-1;j++)
	{
		for(k=0;k<n-1-j;k++)
		{
			if(a[k]>a[k+1])
			{
				c=a[k];
				a[k]=a[k+1];
				a[k+1]=c;
			}
		}
	}
	average=sum/(float)n;
	if(average-a[0]>a[n-1]-average)
		printf("%g",a[0]);
	if(average-a[0]==a[n-1]-average)
		printf("%g,%g",a[0],a[n-1]);
	if(average-a[0]<a[n-1]-average)
		printf("%g",a[n-1]);
	return 0;
}
