favourite number 1

Arohan likes number $1$ . he gives a matrix with $r$ rows and $c$ columns (where each cell contains either 0 or 1) to his student John . John want to impress his teacher Arohan . He decided to change the matrix as follows: if a matrix cell matrix[i][j] is $1$ then all the cells in its $i$th row and $j$th column will become 1. ### Input - The first line of input will contain a single integer $T$,