Doubt in-- SPP - Recursive Sequence (Version II)

I’m getting wrong ans in 2 test cases out of 5. Pls pin-point error in my code,am i missing some corner test cases.
link to my code is— https://ide.codingblocks.com/s/106204

you code isnt easily readable , its shifted to the left, can you give it properly aligned?

i have tried to properly align it nd have also written comments for easy understanding of code.Link to code is—https://ide.codingblocks.com/s/106538

it would be easy if you can understand my simple code with proper functions.
if you dont get it comment again and then will explain it

sir can u elaborate ur approach.I’m not able to understand it entirely.Nd pls tell me what is wrong in my approach?.I’m subtracting sum of first n elements and m-1 elements.Nd first element in my matrix will correspond to sum of first i elements and rest are the elements ai , ai+1,ai+k-1.

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