n=int(input())
l=list(map(int,input().split()))
k=int(input())
l.sort()

#二分探索
right=10**10+1
left=0
while r-l>1:
    mid=(right+left)//2
    
    cnt=0
    for i in range(n):
        cnt+=l[i]//mid
    if cnt>=k:
        left=mid 
    else:
        right =mid
print(r)