#include <bits/stdc++.h>

typedef unsigned long long ULLONG;
typedef long long LLONG;
static const LLONG MOD_NUM = 1000000007LL; //998244353LL;
static const LLONG INF_NUM = 1000000007LL;

template<class _T> static void get(_T& a) {
	std::cin >> a;
}
template<class _T> static void get(_T& a, _T& b) {
	std::cin >> a >> b;
}
template<class _T> static void get(_T& a, _T& b, _T& c) {
	std::cin >> a >> b >> c;
}
template <class _T> static _T tp_abs(_T a) {
	if (a < (_T)0) {
		a *= (_T)-1;
	}
	return a;
}
template <class _T> static _T tp_pow(int base, int exp)
{
	_T ans = 1;

	for (int i = 0; i < exp; i++) {
		ans *= (_T)base;
	}
	return ans;
}

static void A_task();

int main()
{
	A_task();
	fflush(stdout);
	return 0;
}

static void A_task()
{
	int N;
	get(N);
	
	std::vector<LLONG> ai(N), bi(N);
	for (int i = 0; i < N; i++) {
		get(ai[i]);
	}
	for (int i = 0; i < N; i++) {
		get(bi[i]);
	}
	
	std::sort(ai.begin(), ai.end());
	LLONG ans = 0;
	std::vector<LLONG> place;
	for (int i = 0; i < N; i++) {
		place.push_back(bi[i]);
		std::sort(place.begin(), place.end());

		auto it = std::upper_bound(place.begin(), place.end(), ai[i]);
		if (it != place.end()) {
			while (*it >= ai[i] && it != place.begin()) {
				it--;
			}
			if (*it < ai[i]) {
				ans += it - place.begin() + 1;
			}
		}
		else {
			ans += place.size();
		}
	}
	printf("%lld\n", ans);
}