n, q = map(int,input().split())
A = list(map(int, input().split()))
B = list(map(int, input().split()))

dp = [[0]*(n+1) for i in range(n)]
dp[0][0] = A[0]-1
dp[0][1] = 1
for i in range(1, n):
    for j in range(n+1):
        if j == 0:
            dp[i][j] = dp[i-1][j]*(A[i]-1)
        else:
            dp[i][j] = dp[i-1][j-1]+dp[i-1][j]*(A[i]-1)

for b in B:
    print(dp[n-1][b])