#include<bits/stdc++.h>
using namespace std;

int main(){
	int n,s=0;
	cin>>n;
	int a[20]; 
	for(int v=1;v<=n;v++){
		cin>>a[v];
		s=s+a[v];
	}
	float h=s*1.0/n;
	printf("AVE=%.1f\n",h);
	for(int v=1;v<=n;v++){
	if(a[v]>h)cout<<v<<":"<<a[v]<<endl;
	}
	
	
	
	
		
		
		
		
	
	
	
	
	
	
}
/**************************************************************
	Problem: 1155
	User: lidongcheng
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2076 kb
****************************************************************/