#include<bits/stdc++.h>
using namespace std;
int main(){
    int a[20],n,c=0;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];
        c=c+a[i];
    }
    float v=c*1.0/n;
    printf("AVE=%.1f\n" ,v );
    for(int i=1;i<=n;i++){
        if(a[i]>v) cout<<i<<":"<<a[i]<<" ";
    }
}
/**************************************************************
	Problem: 1155
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/