#include<bits/stdc++.h>
using namespace std;
int main()
{	
	int n,i;
	float s=0.0;
	cin>>n;
	float m[100];
	for(i=0;i<n;i++){
		cin>>m[i];
		s+=m[i];
	}
	if(s>100){
		s=(s-100.0)/10*9+100.0;
	}
	printf("%.2f",s);
	return 0;
}

/**************************************************************
	Problem: 1160
	User: zzz
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/