'Mod' Challenge

m!nus · Post by **m!nus** » Sat Jul 12, 2008 6:54 pm

I wrote my code which should work, but it outputs that:

5 test(s) passed
'...' is incorrect.

Is it because of a cycle limitation?

another question: the HVM used to verify the challenge solutions, is it the phyton version or is it even in php?

Post by **adum** » Sat Jul 12, 2008 8:16 pm

hi m!nus -- hmmn, when you take too many cycles it should say something like:
HVM run ERROR: too many cycles: 10002 (PC=1, STACK_SIZE=1)

but yeah, you only have 10k for this one. so you have to be a little smart =)

the hvm on submission is a PHP version. it _should_ behave the same as the python, but if it doesn't, we'd like to debug that. do you see something inconsistent?

adum

m!nus · Post by **m!nus** » Sat Jul 12, 2008 10:37 pm

oh yeah, the HVM error is there, but it disappears in wrong interpreted html

you should do htmlspecialchars() on the output maybe

Post by **adum** » Sat Jul 12, 2008 11:56 pm

mmn, good idea

thanks,
adum

tails · Post by **tails** » Sun Jul 13, 2008 10:45 am

I regularly use JavaScript version of HVM. Solving 'Fast Mod' was very hard with it.

therethinker · Post by **therethinker** » Tue Jul 15, 2008 12:10 am

I too use a JS version of HVM. However, I modified it so that it stored the trace in a variable then displayed them once the program finished, which drastically increased speed.

I didn't have trouble w/ Fast Mod at all. My solution to the prior challenge worked.

tails · Post by **tails** » Tue Jul 15, 2008 12:28 am

Great, therethinker!

It may be a spoiler, but my difficulty was that "32/" becomes 1.5 (not 1) on the JS version HVM on IE6. I tried to manage to write a floor function. :-)

palm162 · Post by **palm162** » Tue Jul 15, 2008 4:44 am

What is HVM i m not to smart yet

therethinker · Post by **therethinker** » Tue Jul 15, 2008 1:59 pm

tails, as far as the JS version goes, it appears to have several implementation bugs. I know I found another earlier on, but I cannot recall. (I also think the program explanation should at least touch upon the call stack.)

I happened to get lucky w/ Fast Mod, I guess

palm162: http://www.hacker.org/hvm/

m!nus · Post by **m!nus** » Tue Jul 15, 2008 2:57 pm

i tried to convert the python HVM to PHP but it didnt work though, had no time to fix it yet

therethinker · Post by **therethinker** » Tue Jul 15, 2008 4:12 pm

Curiously, has anyone written a higher-level language and a to-HVM compiler? Back when it was just strlen & the Small World challenges, it didn't make much sense to do it, but with newly added ones, it might not be so stupid.

(I wouldn't want your implementation, I'm just curious if its been done.)

Post by **adum** » Wed Jul 16, 2008 12:03 am

i think bok has fixed the hvm javascript bugs now.

i just got my hvm assembler working. doing the jumps by hand is such a huge pain. i know at least one other solver has written a tool. this is one thing we don't want shared on the forums. but sharing an hvm implementation in a different lang (like someone did for C#) is just fine.

adum

therethinker · Post by **therethinker** » Wed Jul 16, 2008 4:17 am

Oh, I agree, I know I wouldn't want my assembler public.

m!nus · Post by **m!nus** » Wed Jul 16, 2008 1:45 pm

therethinker wrote:Curiously, has anyone written a higher-level language and a to-HVM compiler? Back when it was just strlen & the Small World challenges, it didn't make much sense to do it, but with newly added ones, it might not be so stupid.

(I wouldn't want your implementation, I'm just curious if its been done.)

thanks for the idea, i'm gonna try making one, now that i have finally time again

ajay · Post by **ajay** » Fri Jul 25, 2008 9:43 am

tails wrote:I regularly use JavaScript version of HVM. Solving 'Fast Mod' was very hard with it.