n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
c = list(map(int, input().split()))
a = sorted(a)
b = sorted(b)
c = sorted(c)
i = 0
j = 0
k = 0
ans = 0
bb = [0] * len(b)
bp = 0
ap = 0
while bp < len(b):
    while ap < len(a) and a[ap] < b[bp]:
        ap += 1
    bb[bp] = ap
    bp += 1
cp = 0
cc = [0] * len(c)
bp = 0
while cp < len(c):
    while bp < len(b) and b[bp] < c[cp]:
        cc[cp] += bb[bp]
        bp += 1
    if cp > 0:
        cc[cp] += cc[cp - 1]
    cp += 1
print(sum(cc))