#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,l;
	double k;
	cin>>n;
	int a[n];
	for(int i=0;i<n;i++){
		cin>>a[i];
	}
	for(int j=0;j<n;j++){
		k+=a[j];
	}
	k/=n;
	cout<<"AVE=";
	printf("%.1f",k);
	cout<<endl;
	for(int m=0;m<n;m++){
		if(a[m]>k){
			
			cout<<m+1<<":"<<a[m]<<" ";
		}
	}
}

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