new(1)

class Matrix:
    def __init__(self, width: int, height: int):
        self.__width = width
        self.__height = height
        self.__arr = list()
        for i in range(self.__height):
            temp = list()
            for i in range(self.__width):
                temp.appen(0)
            self.__arr.append(temp)

    def len(self):
        return (self.__width, self.__height)

    def arr(self):
        return arr

    def rotate(self, angle=90):
        if angle == 90:
            times = 1
        elif angle == 180:
            times = 2
        elif angle == -90:
            times = 3
        else:
            raise ValueError

        for x in range(times)
            array = self.__arr
            array.reverse()
            new_array = list()
            for i in range(width):
                for j in range(height):
                    new_array[i][j] = array[j][i]
            self.__arr = new_array