#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,i;
	float AVE=0;
	cin>>n;
	int a[n];
	for(i=0;i<n;i++){
		cin>>a[i];
		AVE=AVE+a[i];
	}
    AVE=AVE/n;
    cout<<"AVE=";
    printf("%.1f",AVE);
    cout<<endl;
    for(i=0;i<n;i++){
    	if(a[i]>AVE){
    		cout<<i+1<<":"<<a[i]<<" ";
    	}
	}
}
/**************************************************************
	Problem: 1155
	User: hongjiaming
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2076 kb
****************************************************************/