I think, that there are some bugs in tests answers and judge
solutions. My long ariphmetics with bugs gets AC and without - WA.
All problems were in multiplication. I had overflow of WORD and got
AC. Who knows, how to post my opinion to site Creators.

> I think, that there are some bugs in tests answers and judge
> solutions. My long ariphmetics with bugs gets AC and without - WA.
> All problems were in multiplication. I had overflow of WORD and got
> AC. Who knows, how to post my opinion to site Creators.