class Cell:    
    def __init__(self, x, y, is_wall=False, is_start=False, is_exit=False):
        self.x = x
        self.y = y
        self.is_wall = is_wall
        self.is_start = is_start
        self.is_exit = is_exit
    
    def is_passable(self):
        return not self.is_wall
    
    def __repr__(self):
        return f"Cell({self.x}, {self.y}, wall={self.is_wall})"