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

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