def solve(maze, start, end): def is_valid(x, y): return 0 <= x <len(maze) and 0 <= y <len(maze[0]) and maze[x][y]=='.' def dfs(x, y, path): if (x, y) == end: return path directions = [(1,0),(0,1),(-1,0),(0,-1)] for dx, dy in directions: new_x, new_y = x + dx , y + dy if is_valid(new_x, n...