n=int(input())
l1=list(map(int,input().split()))
def qiuHe(n):
    s=0
    for i in l1:
        s+=i
    return s
s=qiuHe(l1)
if s>100:
    s=(s-100)*0.9+100
    print('%.2f'% s)
else:
    print(s)
/**************************************************************
	Problem: 1160
	User: admin
	Language: Python
	Result: Accepted
	Time:98 ms
	Memory:34480 kb
****************************************************************/