class Bit:
    def __init__(self, n):
        self.size = n
        self.tree = [0] * (n + 1)

    def sum(self, i):
        s = 0
        while i > 0:
            s += self.tree[i]
            i -= i & -i
        return s

    def add(self, i, x):
        while i <= self.size:
            self.tree[i] += x
            i += i & -i

N, = map(int, input().split())
X = list(map(int, input().split()))
Y = list(map(int, input().split()))
Z = list(set(X+Y))
Z.sort()
x2i = dict()
i = 1
for z in Z:
    x2i[z] = i
    i+=1
M = i
bt = Bit(M)
X.sort()
R = 0
for i in range(N):
    y = x2i[Y[i]]
    bt.add(y, 1)
    x = x2i[X[i]]
    R += bt.sum(x-1)
print(R)