N = int(input())
parties = list(map(int, input().split()))
monsters = list(map(int, input().split()))

maximum = 0
for i in range(N):
    k = i
    battles = []
    for j in range(N):
        battles.append([parties[j], 0])
    for j in range(N):
        idx = battles.index(min(battles))
        min_party = min(battles)

        min_party[0] += (monsters[k] // 2)
        min_party[1] += 1
        battles[idx] = min_party
        k += 1
        if k >= N:
            k = 0
            
    for battle in battles:
        if maximum < battle[1]:
            maximum = battle[1]
            
print(maximum)