N = int(input())
X = list(map(int,input().split()))
Y = list(map(int,input().split()))
MOD = 998244353
A = [0]*(N+1)
A[0]=A[1]=1
for i in range(2,N+1):
    A[i]=(i*A[i-1])%MOD
X = [(X[i],0) for i in range(N)]
Y = [(Y[i],1) for i in range(N)]
Z = X+Y
Z = sorted(Z,key=lambda x:x[0])
n0 = 0
for i in range(N):
    if Z[i][1]==0:
        n0 += 1
n1 = N-n0
ans = (A[n0]*A[n1])%MOD
print(ans)