# a, b = map(int, input().split())
# n = 0
# for i in range(9999):
# if a < b:
# break
# a -= b
# n += 1
# a += 1
# print(n)
n, a, b = map(int, input().split())
first = list(map(int, input().split()))
second = list(map(int, input().split()))
x = 0
first.extend(second)
x = list(set(first))
x = len(x)
print(n - x)
y = 0