Maze Solver: Print a Maze With Empty Cells Marked

Problem: Print a Maze (mark empty cells with *) Given a 2D character maze grid of size R x C. Each cell is either a wall #, a walkable empty space ' ' (blank), or other walkable characters. Implement a maze printing routine that outputs the same maze, but replaces every blank space ' ' with * when printing. All other characters must remain unchanged. Input Line 1: two integers R C Next R lines: strings of length C representing the maze In this stdin format, . represents a blank space (since raw spaces are hard to see) Output Print R lines of length C Every . cell must be printed as * Constraints 1 <= R, C <= 200 Example Input: 3 5 ##### #...# ##### Output: ##### #***# ##### Example Input 3 5 ##### #...# ##### Output ##### #***# #####