The Euler Project
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 little joey
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The Euler Project
If you're tired of the endless stream of WAs and TLEs or you find yourself reading problem descriptions over and over again, without any increase in comprehension, it sure is time for some R&R. May I then recommend 'Project Euler' which can be found at http://mathschallenge.net.
It is a nice set of (currently 100) challenges mostly mathematical in nature that require moderate programming skills to solve. A lot of fun and highly addictive. Be warned .
It is a nice set of (currently 100) challenges mostly mathematical in nature that require moderate programming skills to solve. A lot of fun and highly addictive. Be warned .

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Thanks for posting this link! You were right, it's highly addictive . The last couple of days I've enjoyed solving problems from this site. I found this an excellent way to train myself in number theory, as I'm somewhat weak in this area.
I liked the submission system a lot, including the fact that I don't have to worry about TLE at all (unless the programs need days to finish...) and the freedom to choose the tool I want to solve the problems.
I liked the submission system a lot, including the fact that I don't have to worry about TLE at all (unless the programs need days to finish...) and the freedom to choose the tool I want to solve the problems.
 little joey
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 Posts: 1080
 Joined: Thu Dec 19, 2002 7:37 pm

 System administrator & Problemsetter
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hmm
Interesting site.
Seems like many of my problems are more suitable to that site than UVA .
Seems like many of my problems are more suitable to that site than UVA .
 little joey
 Guru
 Posts: 1080
 Joined: Thu Dec 19, 2002 7:37 pm
<BUMP AGAIN>
The current problem count is 156, and the latest additions are getting increasingly difficult. Project Euler now has its own website http://www.projecteuler.net.
Enjoy!
The current problem count is 156, and the latest additions are getting increasingly difficult. Project Euler now has its own website http://www.projecteuler.net.
Enjoy!
The biggest problem with most problems is not how to solve the problem, but how to not solve what is not the problem.

 Experienced poster
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Re: The Euler Project
I've forgotten what is the closed form of a series like the one follows..
1.2 + 2.3 + 3.4 + 4.5 + ........................ + (n1).n === ???
pls help
1.2 + 2.3 + 3.4 + 4.5 + ........................ + (n1).n === ???
pls help
You should not always say what you know, but you should always know what you say.
Re: The Euler Project
What do you mean by "(n1).n"? When n is 10, it's 9.1 or 10?

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Re: The Euler Project
when n = 10 its 9 x 10
sorry I used dots for multiplication notations
sorry I used dots for multiplication notations
You should not always say what you know, but you should always know what you say.
Re: The Euler Project
Just compute values of that sum for first few N and look them up in OEIS.

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Re: The Euler Project
Thank you so much....
You should not always say what you know, but you should always know what you say.

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Re: The Euler Project
What you said it is so interesting.Thank you.
Every journey begins with the first step