#include<bits/stdc++.h>
using namespace std;
int main()
{
    int i,n,o=0,b=0;
    float u=0,a[100];
    cin>>n;
    for(i=0;i<=n-1;i++){
        cin>>a[i];
        u+=a[i];
    }
    if(u>100)
    u=100+(u-100)*0.9;
    printf("%.2f",u);
}
/**************************************************************
	Problem: 1160
	User: baizhoudeyueguang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/