#include<bits/stdc++.h>
using namespace std;
int n,s;
int main(){
	cin>>n;
	int a[123] ;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		s=s+a[i];
	}
	float v=s*1.0/n;
	printf("AVE=%.1f\n",v);
	for(int i=1;i<=n;i++){
		if(v<a[i])cout<<i<<":"<<a[i] <<" "; 
	}
	
	
	
	
	

	

	return 0;
}

/**************************************************************
	Problem: 1155
	User: chenxuanyi
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2076 kb
****************************************************************/