n = int(input())
r = list(map(int,input().split()))
g = list(map(int,input().split()))
b = list(map(int,input().split()))
c = 0
for i in r:
	for j in g:
		if i >= j:
			for k in b:
				if i >= k and i < j + k:
					c += 1
print(c)