Need help regarding CHDIGER

I am trying to solve Chef and a Beautiful Digit From March Long challenge. I have tried implementing it but am not able to get why I am getting the wrong answer. I have tried it for many input but I am getting correct for all the input. It would be great if someone could tell me what I am missing.
Attached the link to my code.

https://ideone.com/e.js/fYgwqO

One Test case i found where your solution fails is the following

1

423234 6

Hope This Helps!!.

Dude, The correct output would be 223366

@shivam3211

The correct answer would 223466 only. You are only to append a digit and then remove a digit from any place. So you cannot shift the digits.

Thus to have 2nd digit as “2”, The first 3 needs to be removed. Also since 4<6 There is no need to remove 4. Thus the minimum number that can be obtained turns out to be 223466.

(223366 > 223346, and both 223366 and 223346 cannot be obtained by only appending and removing a digit.)

Got it. Thanks a lot for the help.

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