You can move only up, down, left, or right. Each square in the maze can be in one of four states: clear, blocked, path, or visited. Initially, each square is either clear or blocked. If a square lies on a successful path, mark it with a period. If you enter a square but it does not lead to a successful path, mark the square as visited. Let a two-dimensional array represent the maze. Use a stack-based algorithm to find a path through the maze.