In reply to dave_59:
Hi dave ,
Thanks for the solution. But I have doubts regarding col-sum.
a.sum() with (int'(a[item.index][i]))== 10; // cols a[0][i] + a[1][i]
-How is it working? what does item.index mean?
And what about diagonals? If I want to put constraints on the sum of values of diagonals How should I write the code?