Kya title dalu kuch samajh hi nhi aaya aise lga jaise khud ko hi samjha rhe ho

#1

i cant understand anything in this concept

#2

Watch the video again for more clarity. Have patience as it may take sometime to grasp.
You can also refer this article
https://www.geeksforgeeks.org/sum-of-all-submatrices-of-a-given-matrix/#:~:text=Let%20us%20suppose%20the%20index,*%20(N%20–%20Y)%20.

#3

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