class BIT():
    def __init__(self,n):
        self.BIT=[0]*(n+1)
        self.num=n

    def query(self,idx):
        res_sum = 0
        while idx > 0:
            res_sum += self.BIT[idx]
            idx -= idx&(-idx)
        return res_sum

    #Ai += x O(logN)
    def update(self,idx,x):
        while idx <= self.num:
            self.BIT[idx] += x
            idx += idx&(-idx)
        return

N = int(input())
a = list(map(int,input().split()))
b = list(map(int,input().split()))
a.sort()
res = 0

S = set([a[i] for i in range(N)]+[b[i] for i in range(N)])
S = list(S)
S.sort()
comp = {i:e+1 for e,i in enumerate(S)}

bit = BIT(len(S))
for i in range(N):
    bit.update(comp[b[i]],1)
    res += bit.query(comp[a[i]]-1)

print(res)