#include "bits/stdc++.h"
using namespace std;


int main() {
	int N; cin >> N;
	vector<int>a(N);
	for (int i = 0; i < N; i++) {
		cin >> a[i];
	}
	vector<int>b(N);
	for (int i = 0; i < N; i++) {
		cin >> b[i];
	}
	vector<int>idx(N);
	for (int i = 0; i < N; i++)idx[i] = i;
	int ma = 0;
	sort(a.begin(), a.end());
	do {
		int now = 0;
		for (int i = 0; i < N; i++) {
			now += max(0, a[idx[i]] - b[i]);
		}
		ma = max(ma, now);
	} while (next_permutation(idx.begin(), idx.end()));
	sort(a.begin(), a.end());
	int cnt = 0;
	do {
		int now = 0;
		for (int i = 0; i < N; i++) {
			now += max(0, a[idx[i]] - b[i]);
		}
		if (now == ma) {
			cnt++;
		}
	} while (next_permutation(idx.begin(), idx.end()));
	cout << cnt << endl;
}