N = int(input())
A = sorted(list(map(int,input().split())))
B = sorted(list(map(int,input().split())))
C = sorted(list(map(int,input().split())))
Amax = A[-1]
CC = [0] * (Amax+1)
j = 0
temp = 0
for c in C:
    if c > Amax:
        break
    while j < c:
        j += 1
        CC[j] = CC[j-1]
    temp += 1
    CC[j] = temp
while j < Amax:
    j += 1
    CC[j] = CC[j-1]

ans = 0
for a in A:
    for b in B:
        if b > a:
            break
        ans += CC[a] - CC[a - b]
        #print(a,b,CC[a],CC[a-b+1],CC[a] - CC[a - b])
print(ans)