class Fenwick_Tree:
    def __init__(self, n):
        self._n = n
        self.data = [0] * n

    def add(self, p, x):
        assert 0 <= p < self._n
        p += 1
        while p <= self._n:
            self.data[p - 1] += x
            p += p & -p

    def sum(self, l, r):
        assert 0 <= l <= r <= self._n
        return self._sum(r) - self._sum(l)

    def _sum(self, r):
        s = 0
        while r > 0:
            s += self.data[r - 1]
            r -= r & -r
        return s
    
    def get(self, k):
        k += 1
        x, r = 0, 1
        while r < self._n:
            r <<= 1
        len = r
        while len:
            if x + len - 1 < self._n:
                if self.data[x + len - 1] < k:
                    k -= self.data[x + len - 1]
                    x += len
            len >>= 1
        return x
    
from bisect import *
from copy import deepcopy
def compress(lst):
    """
    B: lstを座圧したリスト
    D: indexから元の値を取得する辞書
    """
    B = []
    D = dict()
    vals = deepcopy(lst)
    vals = list(set(vals))
    vals.sort()
    for i in range(len(lst)):
        ind = bisect_left(vals, lst[i])
        B.append(ind)
    for i in range(len(B)):
        D[lst[i]] = B[i]
    return B, D

N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
ind, D = compress(A + B)
AA, BB = [0] * N, [0] * N
for i in range(N):
    AA[i] = D[A[i]]
    BB[i] = D[B[i]]    

AA.sort()
T = Fenwick_Tree(2 * N + 5)
ans = 0
for i in range(N):
    T.add(BB[i], 1)
    ans += T.sum(0, AA[i])
print(ans)