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Discussion of Problem 1589. Sokoban

Problem with checker
Posted by 3AbEI/I 28 Oct 2007 22:22
There is some problem with checker.
The last two my submitions differs only in priority of directions ('d', 'u', 'r', 'l' and 'r', 'l', 'd', 'u', so result for second example was "dddrrrruLdlUUUluRR" and "rrdddrruLdlUUUluRR" respectively), and the first of this attempts was WA3 while the second one was WA2. Please fix this problem or add some requirements to make the answer to be unique.
Re: Problem with checker
Posted by Sergey Pupyrev [USU] 28 Oct 2007 23:00
Are u sure that your second answer is really "rrdddrruLdlUUUluRR"? Checker on my local system outputs 'ok' for 2nd test case on both answers.
Re: Problem with checker
Posted by Alias (Alexander Prudaev) 28 Oct 2007 23:37
my answer is
rrdddrruuLrddllluuurDlddrUluRddrruLruLddlluuRlddrruLrruLdldlluururDllddrUluurDlddrrUdlluurRlldRdrUUUluRR
i check it, it is right answer too
but a have WA2
Re: Problem with checker
Posted by Alias (Alexander Prudaev) 28 Oct 2007 23:56
test case #2 is the same test as Sample#2 ?
Re: Problem with checker
Posted by 3AbEI/I 29 Oct 2007 00:06
I rechecked answer just now. It was "rrdddrruLdlUUUluRR".
Re: Problem with checker
Posted by 3AbEI/I 29 Oct 2007 00:18
Everything seems to be ok now. I've submitted the same solution, and now I have TLE6...
Re: Problem with checker
Posted by Sergey Pupyrev [USU] 29 Oct 2007 00:20
Yes, the second test is sample.
There were some problems with checker. Now it's all right.
Old solutions will be rejudged soon.