degF = int(input())
F = list(map(int, input().split()))
degG = int(input())
G = list(map(int, input().split()))
L = degF + degG + 1
ans = [0]*L

for i in range(degF+1):
    for j in range(degG+1):
        ans[i+j] += F[i]*G[j]
for _ in range(L):
    ans[_] = str(ans[_] % 258280327)
print(L-1)

print(" ".join(ans))