int main()
{
	int n,i,j,m;
	float a[300],jun,sum,max,k,t;
	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(i=0;i<n-1-j;i++)
			if(a[i]>a[i+1]){
				t=a[i];
				a[i]=a[i+1];
				a[i+1]=t;
			}
	}
	jun=sum/n;
	max=jun-a[0];
	for(i=1;i<n;i++){
		k=a[i]-jun;
		if(k<0){
			k=0-k;
		}
		if(k>max)
			max=k;
	}
	for(i=0;i<n;i++){
		k=a[i]-jun;
		if(k<0){
			k=0-k;
		}
		if(k==max){
			printf("%d",(int)a[i]);
			break;
		}
	}
	m=i+1;
	for(i=m;i<n;i++){
		k=a[i]-jun;
		if(k<0){
			k=0-k;
		}
		if(k==max){
			printf(",%d",(int)a[i]);
		}
	}
	return 0;
}
