#coding=UTF-8

N=int(input())

mojir=input()
hyo=mojir.split(" ")
C=list(range(0,N,1))

for idx in range(0,N,1):
    C[idx]=int(hyo[idx])
tohyo=sum(C)

ans=0
for idx in range(0,N,1):
    if C[idx] <= tohyo//10:#端数に注意
        ans=ans+30


print(ans)