import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
A=[int(i)*(10**4) for i in input().split()]
B=[int(i)//2 for i in input().split()]
import heapq
import copy
ans=n
for i in range(n):
  Q=copy.deepcopy(A)
  heapq.heapify(Q)
  for j in range(n):
    ind=i+j
    if ind>=n:
      ind%=n
    q=heapq.heappop(Q)
    q+=B[ind]*(10**4)+1
    heapq.heappush(Q,q)
  cur=0
  for q in Q:
    cur=max(cur,q%(10**4))
  ans=min(ans,cur)
print(ans)