awa

#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    int n,arr[114514]={};
    double sum=0;
    cin>>n;
    for(int i=1;i<=n;i++){
        int k;
        cin>>k;
        arr[i]=k;
        sum+=k;
    }
    sum/=n;
    printf("AV=%.1lf\n",sum);
    for(int i=1;i<=n;i++){
        if(arr[i]>sum){
            cout<<i<<":"<<arr[i]<<" ";
        }
    }
    return 0;
}