Invoke the Python implementation like so:
python sudoku.py INPUT_FILENAME DELAY
where the value of DELAY: - if non-negative, sets the time that each step remains on the screen - if -1, switches off verbose output and just prints the result - it is an error to supply any other value
You will need to build the C implementation.
If you have a C compiler installed, just run make sudoku.
Invoke the C implementation like so:
./sudoku INPUT_FILENAME