Leet code dp codes

#1

plz explain to me how the output is coming/

#2

hello @Somasree

u need to replace each coordinate (i,j) with sum of element (r,c)
where r varies from i-k … i+k , c varies from j-k …j+k

example->
[[1,2,3],
[4,5,6],
[7,8,9]]
k=1
consider (0,0) coordinate .
here r will vary from [ 0-1…0+1] -> [-1…1] ignore negative index
r-> [0…1]
similary c [0-1,0+1] => [-1…1] -> [0…1]

resultant value at (0,0)-> value (0,0) + value(0,1) + value(1,0) + value(1,1)

which is 12.
similary for other coordintates

#3

ok understood thank u

#4

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