#include<bits/stdc++.h>
using namespace std;
int main()
{
	double sum=0,AVE=0, n;int a[11];
	cin>>n;
	for(int i=0;i<n;i++){
	cin>>a[i];sum+=a[i];	
	}
	AVE=sum/n;	
	printf("AVE=%.1lf\n",AVE);
	for(int i=0;i<n;i++){
		if(a[i]>AVE){
			cout<<i+1<<":"<<a[i]<<" ";
		}		
	}
	return 0;
}

/**************************************************************
	Problem: 1155
	User: zy002
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2076 kb
****************************************************************/