con = 998244353

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N, Q = getlist()
	A = getlist()
	B = getlist()
	DP = [0] * (N + 1)
	DP[0] = 1
	for i in range(N):
		for j in range(N - 1, -1, -1):
			DP[j + 1] += DP[j]
			DP[j + 1] %= con
			DP[j] = (DP[j] * (A[i] - 1)) % con

	for i in range(Q):
		print(DP[B[i]])

if __name__ == '__main__':
	main()