import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String[] sa = br.readLine().split(" ");
		int[] x = new int[n];
		for (int i = 0; i < n; i++) {
			x[i] = Integer.parseInt(sa[i]);
		}
		sa = br.readLine().split(" ");
		int[] y = new int[n];
		for (int i = 0; i < n; i++) {
			y[i] = Integer.parseInt(sa[i]);
		}
		br.close();

		Arrays.sort(x);
		Arrays.sort(y);
		int ix = 0;
		int iy = 0;
		int cx = 0;
		int cy = 0;
		while (cx + cy < n) {
			if (x[ix] < y[iy]) {
				cx++;
				ix++;
			} else {
				cy++;
				iy++;
			}
		}

		int mod = 998244353;
		long[] p = new long[n + 1];
		p[0] = 1;
		for (int i = 1; i < p.length; i++) {
			p[i] = p[i - 1] * i % mod;
		}

		long ans = p[cx] * p[cy] % mod;
		System.out.println(ans);
	}
}