I have submitted solution and have got AC (ID 3108352) but it doesn't pass some tests. For example, for input

146
0

its output is 21, not 23.

And there are a lot of other cases with wrong output.
I think, something should be changed in test data.

New tests were added. 208 authors lost AC after rejudge.

Wow, that was your gift for Christmas?? I'm kidding of course; it takes no more than 5-6 mins to write a new correct solution:) Happy holidays!