解

#include <iostream>
using namespace std;
int main(){
    double n,k=0.0;
    cin >>n;
    int a[110];
    for(int i=1;i<=n;i++){
        cin >>a[i];
        k+=a[i];
    }
    printf("AV=%.1f\n",k/n);
    for(int i=1;i<=n;i++){
        if(a[i]>k/n){
            cout <<i<<":"<<a[i]<<" ";
        }
    }
    return 0;
}