nw = int(input())
W = list(map(int, input().split()))
nb = int(input())
B = list(map(int, input().split()))

import copy
W_ = copy.copy(W)
B_ = copy.copy(B)

W_.sort()
B_.sort()

# W > B
cur = W_.pop()
cnt1 = 1
while True:
    if cnt1%2 == 1:
        while B_:
            if B_[-1] >= cur:
                B_.pop()
            else:
                cur = B_.pop()
                cnt1 += 1
                break
        else:
            break
    else:
        while W_:
            if W_[-1] >= cur:
                W_.pop()
            else:
                cur = W_.pop()
                cnt1 += 1
                break
        else:
            break
W_ = copy.copy(W)
B_ = copy.copy(B)

W_.sort()
B_.sort()

# B > W
cur = B_.pop()
cnt2 = 1
while True:
    if cnt2%2 == 1:
        while W_:
            if W_[-1] >= cur:
                W_.pop()
            else:
                cur = W_.pop()
                cnt2 += 1
                break
        else:
            break
    else:
        while B_:
            if B_[-1] >= cur:
                B_.pop()
            else:
                cur = B_.pop()
                cnt2 += 1
                break
        else:
            break
print(max(cnt1, cnt2))