#include <bits/stdc++.h>
using namespace std;
int main(){
	int  n,i,h=0;
	cin>>n;
	int a[n];
	for(i=0;i<n;i++){
		cin>>a[i];
		h=h+a[i];
	}
	if(h<=100){
		printf("%.2f",h);
	}else{
		printf("%.2f",(h-100)*0.9+100);
	}
	
}
/**************************************************************
	Problem: 1160
	User: linzihang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/