#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	float p=0;
	cin>>n;
	int a[n];
	for(int i=0;i<n;i++){
		cin>>a[i];
		p=a[i]+p;
	}
	p=p*1.0/n;
	printf("AVE=%.1f\n",p);
	for(int i=0;i<n;i++){
		if(a[i]>p){
			cout<<i+1<<":"<<a[i]<<" ";
		}
	}
}
/**************************************************************
	Problem: 1155
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/