Do yourself a favor and upgrade from what works to what works best.

% For subgrid of size n, subgrids can be identified by labels 1..n*n % A cell (x,y) can be mapped to the subgrid labeled 1+(((x-1)/n)*n+(y-1)/n) % Your implementation ...

In this project, we will develop a sudoku solver that uses a more friendly interface than the one used in the first project. For instance, the following corresponds to the new input and output format ...