#include<bits/stdc++.h>
using namespace std;
int main(){
	int a;
	double p=0,x;
	cin>>a;
	for(int i=0;i<a;i++){
		cin>>x;
		p+=x;
	}
	if(p<=100) printf("%0.2lf",p);
	else if(p>100) printf("%0.2lf",(p-100)*0.9+100);
}
/**************************************************************
	Problem: 1160
	User: wuzhijing
	Language: C
	Result: Compile Error
****************************************************************/