import numpy as np
mod = 998244353
N, Q = map(int, input().split())
A = np.array(input().split(), dtype=np.int64)
B = np.array(input().split(), dtype=np.int64)

dp = np.zeros(N + 1, dtype=np.int64)
dp[0] = 1
for a in A:
    prev = np.copy(dp)
    dp *= a - 1
    dp %= mod
    dp[1:] += prev[:-1]
    dp %= mod

ans = dp[B]
print(*ans, sep="\n")