The Project Euler thread
for getting stargroup mad at people leaking answers EXCEPT NOT BECAUSE WE HAVE...
http://projecteuler.net/ what you do is simple: 1. make an account 2. open a problem 3. solve the shit out of it 4. rinse and repeat a lot of the problems, ESPECIALLY later on, require you to find a general solution via programming and plug some ridiculously large parameters into them anyway, i have completed: 113, 16, 18, 28, 33, 52, 67, 79, 108, 110, 157, 267, 355 and i am working on something... 
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I've completed 3 of the puzzles so far, mostly because I have very little time to complete them. I will be going in linear order from start to finish! Using C++ as my language because I'm taking a course on it right now.
Excellent idea ffr4eva. When people run into problems they can post their questions here, just remember to hide your solutions in spoiler tags and try not to ever post the complete solution! 
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i have 125, 28 and 30 And i work with java 
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So far I've done 1,2,3,5 and 6. I just learned about the bigInteger type in Java so now I'll be using that (since the 'long' type isn't ****ing long enough __.)

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I used manual math with arrays of integers 
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This seems really interesting. I could try to do this on my free time to work on my computer skills.

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I'm currently at 49, using mostly Maple. I have done a couple in C++ too, where speed mattered.
I should get back into it. Friend key is 62306152188978_1d29510ddc0c52e8c33db3cdbaf399db for interested people. 
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* Working on P83 *
I'm mostly using Ruby and C My friend key: 1858629421787_a864c4e88f44e36b8023644c0f14493e 
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I just started today and got 1, 2, 3, 5, 6, 7, 9, 10, 16, 20, 25, 45, 48, and 52 solved. I'm using Mathematica here.
Friend Key: 76814575274714_b466b39d7ef7730e66d3da5b16df2525 
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By the way... Friend Key: 41335338220707_9d1fa87f00c010a47b494214e8b3416e ^_^
EDIT: I managed to do a few today, and now I have 110 done. ^_^ Quote:

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I was into this for a while but got bored. It's a lot of fun, though. Some of the later problems are very tricky.

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@leonid: I got an answer to #80 but I don't understand why it's not the correct answer. Can you help me figure out the problem in my code?
Just to see if there is something wrong in my code, I tried using my program to help me determine some values. Let's define the digital sum of the first 100 digits of radical n to be f(n). Are these values correct? I chose a few test numbers just to see if my program is telling me the right digital sum. It did tell me that f(2) = 475 which was given in the problem. f(3) = 441 f(7) = 398 f(35) = 440 f(69) = 439 f(95) = 460 Any help would be appreciated. Thanks! 
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From what I can see, you seem to be rounding off your 100th decimal.

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I don't think it's a rounding error because the 100th decimal digit of radical 2 is 7, which would round the 99th decimal digit up. When I created that set of digits, 2 was the last element of that set, so that doesn't seem to be the problem in my program. 
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Let's take f(95). Its 100 digits are: (note my program counts backwards)
which gives a sum of 459. The 101st decimal is a 6, so if rounded up the 7, you would get to your answer of 460. And yes the problem isn't clear, but thanks to the example, you can understand they mean to have 100 significant digits. 
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hmm maybe I will get back into this
seeing leonid ahead of me is making my competitive core act up (by that I mean he could kick my ass at this shit but idgaf) heh solved problem 68 in excel 
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I think I'm going to get started with this. Wanted to work on my programming skills. On my reading week and nobody else I know is so why not. Probably going to work in C or Perl.

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Problem 96 is solving 50 sudoku problems. I'm very tempted to cheat

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