Sum Of All Submatrix From A given Matrix - Approach 2

#1

In the given video value of P,Q and R will garbage value for the case of i=0, and j=0…
please explain…

#2

Hello @Bansaljatin05

Here while fetching the prefixes P, Q, and R from the prefix matrix we will make sure that we are not accessing anything out of the bounds of the matrix using if statements.

Like to calculate R we will do

int R;
if(li != 0 && lj != 0) {
R = prefixMatrix[li - 1][lj - 1];
}

#3

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