import sys
from heapq import heappop,heappush,heapify
from copy import deepcopy
sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


N = I()
A,B = LI(),LI()
A = [A[i]<<11 for i in range(N)]
B = [B[i]//2 for i in range(N)]
B = B+B

ans = 10**18
for i in range(N):
    X = deepcopy(A)
    heapify(X)
    for j in range(N):
        n = heappop(X)
        n0,n1 = divmod(n,1<<11)
        n0 += B[i+j]
        n1 += 1
        heappush(X,(n0<<11)+n1)
    ans = min(ans,max(X[i] % (1<<11) for i in range(N)))

print(ans)