#include<bits/stdc++.h>
using namespace std;
int main(){
int a[15]={0},m,i,h=0;
float p;
cin>>m;
	for(i=0;i<m;i++){
		cin>>a[i];
		h=h+a[i];
	}
	p=h*1.0/m;
	printf("AVE=%.1f\n",p);
	for(i=0;i<m;i++){
		if(a[i]>p){
			cout<<i+1<<":"<<a[i]<<" ";
		}	
	}
	return 0;
}

/**************************************************************
	Problem: 1155
	User: linweilun
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/