#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: jiangyuanfeng
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/