#include <bits/stdc++.h>
using namespace std;
int main() {
    int n,i,h=0,a[110]={0};
    float m=0;
    cin>>n;
    for(i=0;i<n;i++){
        cin>>a[i];
        h=h+a[i];
    }
    if(h>100){
        m=(h*1.0-100)*0.9+100;
        printf("%.2f",m);
    }else{
        printf("%.2f",h);
    }
return 0;
}
/**************************************************************
	Problem: 1160
	User: huanghengyi
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/