H, W = map(int, input().split())
G = [[0] * W for i in range(H)]
ans = 0
for i in range(H - 1):
    for j in range(W - 1):
        if G[i][j] + G[i][j + 1] + G[i + 1][j] + G[i + 1][j + 1] == 0:
            ans += 4
            G[i][j] = 1
            G[i][j + 1] = 1
            G[i + 1][j] = 1
            G[i + 1][j + 1] = 1
print(ans)
if H % 2 and W % 2 and H >= 3 and W >= 3:
    ans += 3
    G[H - 1][W - 1] ^= 1
    G[H - 1][W - 2] ^= 1
    G[H - 2][W - 1] ^= 1
    G[H - 2][W - 2] ^= 1
    
    
for i in range(H):
    print(*G[i])