Main part of the code

#1

why we r taking (0,0,k,0) in solve function .i know about k but y all r zeroes.and also explain the #ifndef and #endif

#2

First two zeroes are for the corresponding indices of the strings, and the last 0 is for continuity, which is 0 because we haven’t matched anything yet and have not made any jumps.(Continuity was better explained int the video).
https://www.cprogramming.com/reference/preprocessor/ifndef.html

#3

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