#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,m=0;
	float sum=0,avg=0;
	cin>>n;
	int a[n];
	for(int i=0;i<n;i++){
		cin>>a[i];
		sum+=a[i];
	}
	
	avg=sum/n;
	printf("AVE=%.1f\n",avg); 
	
	for(int i=0;i<n;i++){
		if(a[i]>avg){
			cout<<i+1<<":"<<a[i]<<" ";
		} 
	}	
	return 0;
}

/**************************************************************
	Problem: 1155
	User: hbq
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/