Stuck in julka for a day

[ttaahhssiinn]

here is my code :

https://paste.ubuntu.com/p/Xc4NfRjRyh/

tried almost all the testcases from comments.

tried these too :
9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
7777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777
9876543210987654321098765432109876543210987654321098765432109876543210987654321098765432109876543210
109876543210987654321098765432109876543210987654321098765432109876543210987654321098765432109876548

and my output was :
8888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888
1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
4993209877099320987709932098770993209877099320987709932098770993209877099320987709932098770993209879
4883333333888333333388833333338883333333888333333388833333338883333333888333333388833333338883333331

cant figure out whats going wrong , someone please help!

[simes]

I can’t see anything wrong, but I see you now got AC. What was the problem?

[ttaahhssiinn]

in the division by 2 part there was some bug handling cases with 0 in the end and in between, made some changes in the code to generate test cases and got the bug