class Bitmap:
    def __init__(self, width, height, color_count):
        self.width = width
        self.height = height
        if color_count > 255:
            raise ValueError("Cannot support that many colors")
        self.values = bytearray(width * height)

    def __setitem__(self, index, value):
        if isinstance(index, tuple):
            index = index[0] + index[1] * self.width
        self.values[index] = value

    def __getitem__(self, index):
        if isinstance(index, tuple):
            index = index[0] + index[1] * self.width
        return self.values[index]

    def __len__(self):
        return self.width * self.height