Sudoku Solver question

#1

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what is wrong with my code it is not chaging the 2d vector help i am passing it by reference only

#2

Hey @sheikhhaji18

#3

why it is called backtracking ,where are backtracking@Kartikkhariwal1 ?

#4

it passed all testcases thanks @Kartikkhariwal1

#5

You are first checking if u can place some number or not
if u can then u place it and go ahead with further recursion calls but it case it didnot work (reach to soln) in further recursions then u remove the placed number(this is backtracking) and try for some other number.

#6

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