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

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