H,W = list(map(int,input().split()))
field = [[0 for _ in range(W)] for _ in range(H)]
for i in range(H-1):
    for j in range(W-1):
        white = 4 - (field[i][j] + field[i+1][j] + field[i][j+1] + field[i+1][j+1])
        if(white >= 3):
            field[i][j] ^= 1
            field[i+1][j] ^= 1
            field[i][j+1] ^= 1
            field[i+1][j+1] ^= 1

print(sum([i.count(1) for i in field]))
for i in field:
    print(*i)