#include<bits/stdc++.h>
using namespace std;
int main()
{
	int i,n,o=0,b=0;
	float u=0,a[100];
	cin>>n;
	for(i=0;i<=n-1;i++){
		cin>>a[i];
		u+=a[i];
	}
	if(u>100)
	u=100+(u-100)*0.9;
	printf("%.2f",u);
	return 0;
}

/**************************************************************
	Problem: 1160
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/