This program prompts the user for a text file containing puzzle data, attempts to solve the puzzle using a brute force algorithm, and prints the solution along with the time it took to solve. I've included 3 sample puzzle files in the "res" folder. "Sub-box width/height" refers to the dimensions of the inner boxes in the puzzle. For example, a 9x9 puzzle has 9 3x3 sub-boxes. The 6x6 puzzle that I've included has sub-box dimensions of 3x2.
This version does not contain any GUI components, so...