Keypad not getting correct answer

#1

I have written the code but it is not giving the correct answer.

link for the code :: https://ide.codingblocks.com/s/189912

#2

You are not applying the concept of backtracking that is needed here.
You are just checking the all possibilities of last number and for starting number you are choosing only the first character.

#3

@Debugger


I have made the changes in the code you can have a look.