MOD = 998244353

def determinant(A):
    A = [a.copy() for a in A]

    n = len(A)
    res = 1

    for i, row in enumerate(A):
        if row[i] == 0:
            for j in range(i + 1, n):
                if A[j][i] != 0:
                    break
            else:
                return 0

            A[i], A[j] = A[j], A[i]
            row = A[i]
            res *= -1

        inv = pow(row[i], MOD - 2, MOD)

        for j in range(i + 1, n):
            a_j = A[j]
            t = a_j[i] * inv % MOD

            for k in range(i + 1, n):
                a_j[k] -= t * row[k]
                a_j[k] %= MOD

    for i in range(n):
        res *= A[i][i]
        res %= MOD

    return res


n, m = map(int, input().split())

A = [[*map(int, input().split())] for _ in range(n)]
B = [[*map(int, input().split())] for _ in range(m)]

C = [[0] * n for i in range(n)]

for k in range(m):
    for i in range(n):
        for j in range(n):
            C[i][j] += A[i][k] * B[k][j]

for i in range(n):
    C[i][i] += 1

print(determinant(C))