N,Q = map(int,input().split())
A = list(map(int,input().split()))
B = list(map(int,input().split()))
mod = 998244353
DP = [0]*(N+10)
DP[0] = 1
for i in range(N):
    for j in reversed(range(i+1)):
        DP[j+1] = (DP[j+1] + DP[j])%mod
        DP[j] = (DP[j]*(A[i]-1))%mod

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