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Search took 0.01 seconds. Search: Posts Made By: Reincarnate
Forum: Technology 03-13-2015, 10:25 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Try sorting by difficulty, too -- there are easy / good problems later on in the problem set, too.
Forum: Technology 03-7-2015, 09:05 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Find x where x^2 = 1_2_3_4_5_6_7_8_9_0

You know the last blank must be a 0.

So now if we divide by 100:

x^2/100 = 1_2_3_4_5_6_7_8_9

(x/10)^2 = 1_2_3_4_5_6_7_8_9
Forum: Technology 03-7-2015, 08:57 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Sort by difficulty instead
Forum: Technology 03-7-2015, 07:36 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

This thread needs more action

New problem up in 2.5 hours
Forum: Technology 08-16-2014, 07:34 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

aaaaaaaaaaaaaaaaaaand live
Forum: Technology 06-26-2014, 06:27 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

who knows
Forum: Technology 06-20-2014, 04:29 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Site is up, limited form
Forum: Technology 06-18-2014, 12:47 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

N/A
Forum: Technology 06-16-2014, 12:51 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Eta -18
Forum: Technology 06-15-2014, 03:48 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

yeah :(
Forum: Technology 06-14-2014, 07:25 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

friendcode?
Forum: Technology 06-14-2014, 07:01 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

that one is really easy though, you really don't need any crazy geometry stuff
Forum: Technology 06-14-2014, 04:36 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

CRT?
Forum: Technology 06-14-2014, 02:51 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Oh yeah

For some reason I found that one surprisingly tricky for some reason
Forum: Technology 06-14-2014, 02:43 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Scary?
Forum: Technology 06-14-2014, 11:32 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Nicely done :)
Forum: Technology 06-14-2014, 08:51 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Ps try the new problem, easy one
Forum: Technology 06-14-2014, 08:47 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Still a fun little problem
Forum: Technology 06-13-2014, 09:06 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Hard to say more without spoiling, but there's something being overlooked (try to find another kind of problem that this is similar to)
Forum: Technology 06-13-2014, 08:53 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Idk about this "two partition" thing but FWIW I can output the full result in Python in under 8 seconds

It's hard to say more without spoiling
Forum: Technology 06-13-2014, 08:15 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

There is a way

Every single problem gets tested against the minute-rule before release.

Problem 266 is doable in a lot less time than that, even
Forum: Technology 06-10-2014, 03:47 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

I read them all (I scroll through the problem listings from time to time and check out new posts).

I just don't have much to add because I don't find those problems as interesting as some of the...
Forum: Technology 06-9-2014, 01:10 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

nice one, leonid








EDIT:
Forum: Technology 06-8-2014, 11:45 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Up to Problem 96, aaaghghghgh Sudoku. Nope. Bedtime

edit: (jk 97, 99, and 100 are quickfodder -- 96 and 98 can diaf)

edit: actually 98 isn't horrible either

edit: GAURUATUGH FINE I'LL DO...
Forum: Technology 06-8-2014, 09:20 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Son of a...

Just solved problem 88, but it is tricky to get in decent runtime. Right now my best is only 14s. :(

EDIT: Oh FFS I am an idiot... much faster way to do this.

EDIT: 0.2 seconds...
Forum: Technology 06-8-2014, 07:44 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

In Python though yes
Forum: Technology 06-8-2014, 11:17 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Total time for problems 1 through 80: 25.627359 seconds
Forum: Technology 06-7-2014, 08:11 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

also update (Python timings):

Total time for problems 1 through 70: 16.428783 seconds
Forum: Technology 06-7-2014, 08:06 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

some of the harder ones though are really beautiful problems, hope you can give them a try at some point (344, 361, and 415 in particular).
Forum: Technology 06-7-2014, 12:33 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

The xor cipher one is fun though
Forum: Technology 06-6-2014, 01:34 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

For permanent posts, you must either:
1. Get in early enough to post on the first four pages
Or
2: If you're on page 5+, get enough Kudos on your post so an admin can make it permanent.
Forum: Technology 06-6-2014, 12:49 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Actually one of the easier ones in the upper-400 series, however
Forum: Technology 06-6-2014, 12:25 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

blah too tired to do more, zzzztime
Forum: Technology 06-5-2014, 07:36 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

I am going to be going through the problems, posting a cumulative timing of all problems from 1 through whatever problem I am on, using Python (including time taken to import any external stuff I...
Forum: Technology 06-5-2014, 07:59 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

If it works, it works. May be worth going back and doing it the "right" way though (or at least reading the forum).
Forum: Technology 06-5-2014, 07:11 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Reuben: even in Python, most problems can be done in under a second
Forum: Technology 06-4-2014, 11:20 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Thinking of making an extra dummy account and starting fresh, using none of my old libraries.

leonid: problem is much faster in something like C++

Edit: nvm ninja'd, PARI/GP is very fast too...
Forum: Technology 06-4-2014, 04:07 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Here's a solution I just wrote for 35 in Python:



n = 10**6
isprime = [0,0]+[1 for i in range(n-1)]
for i in xrange(2,int(n**.5)+1):
if isprime[i]==1:
for j in...
Forum: Technology 06-4-2014, 11:16 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

A little extra time preplanning goes a long way

For 35 you just need a simple sieve and a short rotator method
Forum: Technology 06-3-2014, 07:37 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

I also recall 177 being pretty hard for being an earlier problem
Forum: Technology 06-2-2014, 07:10 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Best answer ever
Forum: Technology 06-1-2014, 05:16 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

The first 100 problems are pretty simple

Try some later problems for more of a challenge
Forum: Technology 05-21-2014, 09:06 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

also, honorable mention for just being a really cool and interesting problem with an elegant solution:

http://projecteuler.net/problem=202
Forum: Technology 05-21-2014, 08:49 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

And of course, (some) of the big kahunas that will require both mathematical and programmatical sorcery:

http://projecteuler.net/problem=289
http://projecteuler.net/problem=328...
Forum: Technology 05-21-2014, 08:44 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

For example, try your hand at any of these:



http://projecteuler.net/problem=161
http://projecteuler.net/problem=425
http://projecteuler.net/problem=442
Forum: Technology 05-21-2014, 08:43 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

absolutely

even more so once you start venturing into the harder stages (where the problems also become much more interesting)

DP, especially, is used quite often
Forum: Technology 05-21-2014, 06:59 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

using brute force = not very interesting

usually more fun to try for the faster approaches
Forum: Technology 05-21-2014, 03:15 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Nicely done
Forum: Technology 05-21-2014, 06:59 AM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

Not every problem can be done with pencil and paper.
Forum: Technology 05-15-2014, 07:42 PM
Replies: 450
Views: 133,325
Posted By Reincarnate
Re: The Project Euler thread

leonid you have not solved a problem in... almost 900 days.

tear
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