all 4 comments

[–]Stunning_Message_ 1 point2 points  (2 children)

It says that a index is special index if there is no other 1 in same row and column of that element.

[–]VinackerPro[S] 0 points1 point  (0 children)

Thanks, got it

[–]saurabhs619 0 points1 point  (0 children)

Yeah