N, Q = map(int, input().split())
A = list(map(int, input().split()))
B = list(map(int, input().split()))

dp = [[0]*(N+1) for _ in range(2)]
mod = 998244353
dp[0][0] = 1
for i in range(1, N+1):
    if i%2==1:
        dp[1] = [0]*(N+1)
    else:
        dp[0] = [0]*(N+1)
    for j in range(i+1):
        dp[i%2][j] += dp[(i-1)%2][j]*(A[i-1]-1)
        dp[i%2][j] %= mod
        if j-1>=0:
            dp[i%2][j] += dp[(i-1)%2][j-1]
            dp[i%2][j] %= mod
for i in range(Q):
    if N%2==1:
        print(dp[-1][B[i]])
    else:
        print(dp[0][B[i]])