N = int(input())
l = list(map(int,input().split()))
M = int(input())
s = list(map(int,input().split()))
w = [(i,0) for i in l]
b = [(i,1) for i in s]
l = w + b
l.sort(reverse = True)
i = 0
ans = 0
while i < len(l):
    flag = l[i][1]
    ans += 1
    while i < len(l) and l[i][1] == flag:
        i += 1
print(ans)