#include<bits/stdc++.h>
using namespace std;
long int a[1010010];
long int n;
double aves;
double ave;
int main(){
	cin>>n;
    for(int i=1;i<=n;i++){
    	cin>>a[i];
    	aves+=a[i];
	}
	ave=aves/n*1.0;
	cout<<"AVE=";
	printf("%.1f",ave);
	cout<<endl;
	for(int i=1;i<=n;i++){
		if(a[i]>ave){
			cout<<i<<":"<<a[i]<<" ";
		}
	}
	return 0;
}
/**************************************************************
	Problem: 1155
	User: zengdongxin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:9968 kb
****************************************************************/