import sys
input = sys.stdin.readline
from collections import *

def compress(l):
    l = list(set(l))
    l.sort()
    idx = defaultdict(int)

    for i in range(len(l)):
        idx[l[i]] = i
    
    return idx

class BIT:
    def __init__(self, n):
        self.n = n
        self.bit = [0]*(n+1)
    
    def add(self, i, x):
        i += 1
        
        while i<=self.n:
            self.bit[i] += x
            i += i&(-i)

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

N = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
a.sort()
idx = compress(a+b)
ans = 0
bit = BIT(2*N)

for ai, bi in zip(a, b):
    bit.add(idx[bi], 1)
    ans += bit.acc(idx[ai])

print(ans)