Old 07-16-2013, 07:23 PM   #241
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Default Re: The Project Euler thread

got problem 6 with no trouble, started on 14 and I had a working script for it but I think it was optimized terribly because after 15 minutes it still wasn't giving me results

whoops
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Old 07-19-2013, 03:40 PM   #242
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yeah I brute forced the fuck out of 14

now I'm doing problem 5 and I'm not sure where I'm fucking up, haven't touched arrays in years

edit: talked to one of the instructors, fixed the code and now I'm waiting xd
I really need to get back into math
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Old 07-19-2013, 05:10 PM   #243
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yeah I brute forced the fuck out of 14

now I'm doing problem 5 and I'm not sure where I'm fucking up, haven't touched arrays in years

edit: talked to one of the instructors, fixed the code and now I'm waiting xd
I really need to get back into math
a clever solution to 5 shouldnt require arrays or waiting. the problem is basically asking for a least common multiple, try thinking of efficient ways of finding those. once you have a solution you could punch it into a calculator (or write a bit of code) and have the answer almost instantly.

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Old 08-8-2013, 12:52 PM   #244
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Default Re: The Project Euler thread

Learned Matlab for the past few weeks and now I'm crunching this stuff in Octave
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Old 09-3-2013, 03:04 PM   #245
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Decimation :)
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Old 11-29-2013, 02:56 PM   #246
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yay
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Old 11-29-2013, 11:08 PM   #247
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Oh how those green checkmarks make you feel warm and fuzzy inside
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Old 02-2-2014, 04:53 PM   #248
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so today i remembered i had an account on this thing with 26 solved that i hadn't touched in over three years.

up to 60 now, running out of easy ones really fast. let's see how this goes. even if nothing happens it'll probably be a more productive use of my spare time than cookie clicker or messing around with bitcoin faucets

i was the 30000th person to do #38 yay
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Old 02-2-2014, 06:25 PM   #249
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I think...I'm going to start this. O_O Time to fail.
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Old 05-12-2014, 09:18 PM   #250
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I will be going in linear order from start to finish!
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Old 05-15-2014, 02:57 PM   #251
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hmmm, I managed to do the first 5 in python a while back. BUT I will try to get through more later because next semester I'm taking a college class for C++ which I've been wanting to learn for a long time. :)
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Old 05-15-2014, 06:50 PM   #252
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I will be going in linear order from start to finish!
you won't finish sorry.
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Old 05-15-2014, 06:56 PM   #253
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who knows.
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Old 05-15-2014, 07:42 PM   #254
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leonid you have not solved a problem in... almost 900 days.

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Old 05-15-2014, 10:55 PM   #255
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I've done about 70 of them, going in order from most solved to least solved.
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Old 05-16-2014, 12:07 AM   #256
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Decided to start doing this again. Going to start from the beginning because I know when I first started my solutions were crap. I used my favorite programming language for this one:


Some actual code:

Code:
/*
* We use the fact that 3+6+9+12+... = 3(1+2+3+..) from which we can
* use the n(n+1)/2 formula for the sum of the first n positve integers
*/
       int a = 999/3; //number of multiples of 3 less than 1000
       int b = 999/5; //number of multiples of 5 less than 1000
       int c = 999/15; //number of multiples of 15 less than 1000
       System.out.println(3*(a)*(a+1)/2+5*(b)*(b+1)/2-15*(c)*(c+1)/2);

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Old 05-16-2014, 07:24 AM   #257
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Ok, screw the whole going in order thing, I'm just going to do problems I haven't done yet haha. This was a nice paper-n-pencil-n-calculator one as well :) Level 1 get.
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Old 05-16-2014, 07:36 AM   #258
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I tend to just brute force everything :/





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Old 05-21-2014, 12:14 AM   #259
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I tend to just brute force everything :/
*solution to problem nine*
if you haven't done these kinds of problems with pencil/paper you should try it

the first time you realize how to do it it's quite enlightening and exciting
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Old 05-21-2014, 12:18 AM   #260
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pencil&paper will only get you so far
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