Can't understand the rectangle part

[abdulajaz20 (Abdullah Ajaz Siddiqui)]

can you please explain how it will take all the possible outcomes where (i,j) is included

[aman212yadav (Aman Yadav)]

hello @abdulajaz20

pls check this discussion ->

Sum of all submatrix from a given Matrix Approach 3

hello @rahul_bansal we need to find (i,j) will be part of how manu sumatrix . so if we pick any cell from upper left part of (i,j) and treat it as upper left corner of matrix and similary pick any cell from bottom right part of (i,j) and treat as bottom right. these two corner can form a unique matrix and will contain (i,j) hence we are having formula (i+1)(j+1) for upper left and (n-i)(m-j) for bottom right corner multiplication of both will give all possible matrices that contain (i,j) …

and let me know if u still have any doubt in this

[aman212yadav (Aman Yadav)]

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.