import sys

sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


class BIT:
    def __init__(self,init_value):
        self.n = len(init_value)
        self.tree = [0]*(self.n+1)
        for i in range(1,self.n+1):
            x = init_value[i-1]
            while i <= self.n:
                self.tree[i] += x
                i += i & (-i)

    def update(self,i,x):  # i(1-index)番目の値を+x
        while i <= self.n:
            self.tree[i] += x
            i += i & (-i)
        return

    def query(self,i):  # 1番目からi(1-index)番目までの和を返す
        res = 0
        while i > 0:
            res += self.tree[i]
            i -= i & (-i)
        return res


N = I()
A = LI()
A.sort()
B = LI()
X = list(set(A+B))
X.sort()
M = len(X)

d = {}
for i in range(1,M+1):
    d[X[i-1]] = i

bit = BIT([0]*200001)
ans = 0
for i in range(N):
    b = B[i]
    bit.update(d[b],1)
    a = A[i]
    ans += bit.query(d[a]-1)

print(ans)