#include<bits/stdc++.h>
using namespace std;
int main(){
int a[15]={0},m,i,h=0;
float p;
cin>>m;
    for(i=0;i<m;i++){
        cin>>a[i];
        h=h+a[i];
    }
    p=h*1.0/m;
    printf("AVE=%.1f\n",p);
    for(i=0;i<m;i++){
        if(a[i]>p){
            cout<<i+1<<":"<<a[i]<<" ";
        }   
    }
    return 0;
}
/**************************************************************
	Problem: 1155
	User: wengsihan
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2076 kb
****************************************************************/