import numpy as np

N = int(input())
F = list(map(int, input().split()))
p1 = np.poly1d(F[::-1])
M = int(input())
G = list(map(int, input().split()))
p2 = np.poly1d(G[::-1])
mod = 258280327
r = p1*p2
print(r.order)
coef = r.c
ans = []
for num in coef[::-1]:
    ans.append(num%mod)
print(*ans)