#include <bits/stdc++.h>
using namespace std;
int main(){
	int i=0,o;
	cin>>o;
	for(int p=0;p<o;p++){
		int a;
		cin>>a;
		i+=a;
	}
	if(i>100)printf("%.2f",100+1.0*(i-100)*0.9);
	else cout<<i<<".00";
	return 0;
}

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