#include<bits/stdc++.h>
using namespace std;
int main(){
  int i,n,s=0;
  int m[100]={0};
  float x=0;
  cin>>n;
  for(i=0;i<n;i++){
  cin>>m[i];
  s=s+m[i];
  } 
  
  if(s>100){
  x=(s-100)/10*9+100;
  }
  printf("%.2f ",x);
  return 0;
}
/**************************************************************
	Problem: 1160
	User: wtq001
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/