N = int(input())
X = list(map(int,input().split()))
Y = list(map(int,input().split()))
xy = []
for i in range(N):
    x = X[i]
    y = Y[i]
    xy.append(x)
    xy.append(y)
xy.sort()
a = 0
for x in X:
    if x <= xy[N-1]:
        a+=1
mod = 998244353
def calc_fact(i):
    rev = 1
    for k in range(1,i+1):
        rev *= k
        rev %= mod
    return rev
ans = calc_fact(a) * calc_fact(N-a)
ans %= mod
print(ans)