n = int(input()); z = 998244353
x = list(map(int,input().split()))
y = list(map(int,input().split()))
m = sorted(x+y)[n]; p = q = 0; a = [1]*(n+1)
for v in x: p += v<m
for v in y: q += v<m
for i in range(1,n+1): a[i] = a[i-1]*i%z
print(a[p]*a[q]%z)