H, W = map(int, input().split())

# Calculate the maximum number of black cells
max_rows = H - (H % 2)
max_cols = W - (W % 2)
ans = max_rows * max_cols

# Generate the grid
grid = []
for i in range(H):
    row = []
    for j in range(W):
        if i < max_rows and j < max_cols:
            row.append(1)
        else:
            row.append(0)
    grid.append(row)

# Output the result
print(ans)
for row in grid:
    print(' '.join(map(str, row)))