#include<bits/stdc++.h>
using namespace std;
int a[999999];
int main(){
	int t=0;
	int n;
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		t=t+a[i];	
	}
	double p=t*1.0/n;
	cout<<"AVE=";
	printf("%.1lf",p);
	cout<<endl;
	for(int i=1;i<=n;i++){
		if(a[i]>p){
			cout<<i<<":"<<a[i]<<" ";
		}
	}
	
	return 0;
}