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

int main(){
	int n,s;
	cin>>n;
	int x[250];
	for(int i=1;i<=n;i++)
	{
		cin>>x[i];
		s=s+x[i];
	}
	float v=s*1.0/n;
	printf("AVE=%.1f\n",v);
	for(int i=1;i<=n;i++)
	{
		if(x[i]>v) cout<<i<<":"<<x[i]<<" "; 
	}
}

/**************************************************************
	Problem: 1155
	User: lidongbo
	Language: C++
	Result: Wrong Answer
****************************************************************/