Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Project Euler is partly back

projecteuler.net

Post reply on HN
Print view View original

11–17 of 17 posts

Re: Project Euler is partly back

#11

Post by abhididdigi »

captn3m0 wrote: post #8

I did a dump of Project Euler sometime back. The script, code, and problems, and solutions are all on github [0]. The finished product was just a terminal-style UI to Project Euler called codebot. You can try it out at http://codebot.sdslabs.co/ [0]: http://github.com/sdslabs/codebot

Thanks!

Re: Project Euler is partly back

#12

Post by reledi »

zxide wrote: post #10
balloot wrote: post #6

Sad. Project Euler is pretty much useless without the problem checking feature. Anyone know a good alternative?

A few months ago I made a gem to manage, run, and test project euler problems. https://github.com/yaworsw/euler-manager

It looks like you check against static answers [1]. This won't work in the long run because, as far as I'm aware, PE changes the numbers in their problems to prevent cheating. Which means the answers you have would be outdated.

1: https://github.com/yaworsw/euler-manager/blob/master/data/an...

Re: Project Euler is partly back

#14

Post by dnet »

djf1 wrote: post #13

The part about salting confuses me. Shouldn't salting remain effective against rainbow tables even when the salting mechanism is known?

It should, and they just said "the integrity of weak passwords cannot be guaranteed" -- even the best salting cannot prevent attackers performing brute force attacks; it will be slow, but weak passwords may be cracked in reasonable time.

Re: Project Euler is partly back

#15

Post by wolf550e »

djf1 wrote: post #13

The part about salting confuses me. Shouldn't salting remain effective against rainbow tables even when the salting mechanism is known?

crypto101 says that because of how fast GPUs are at computing hashes, even using long per-user salt is now broken and you must use pbkdf2 or better yet, scrypt.
Post reply on HN