Hi,

Can someone please write lfousse's code (2nd post in the solution forum) in mathematical notation? I've left a query at the end of my post (currently the last post) in the solution forum outlining my current understanding.

Thanks,

--

thedoctar.

## Search found 71 matches

- Thu Dec 04, 2014 4:02 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 258
- Replies:
**23** - Views:
**9039**

- Mon Mar 03, 2014 7:40 am
- Forum: Recreational
- Topic: Missing Wedding Ring Finger
- Replies:
**18** - Views:
**13535**

### Re: Missing Wedding Ring Finger

Maybe this works: The man who gets of the train with the woman is her husband, but he has multiple personality disorder. He has two personalities, one a normal caring husband, the other a viscious violent mysogynist. His mysoginistic personality has flared up in the past (hence the missing ring fing...

- Wed Oct 02, 2013 1:16 pm
- Forum: News, Suggestions, and FAQ
- Topic: Problem Release
- Replies:
**1** - Views:
**1140**

### Problem Release

So when are new problems released? There's no countdown for 439 yet. What's the interval between the release of two consecutive problems?

- Mon Sep 30, 2013 10:00 am
- Forum: News, Suggestions, and FAQ
- Topic: Natural Numbers
- Replies:
**4** - Views:
**2287**

### Re: Natural Numbers

:O Where did you get that idea?!meconlen wrote:(isn't the purpose of math to exclude all need for intelligent thought?)

- Sat Sep 28, 2013 12:10 am
- Forum: News, Suggestions, and FAQ
- Topic: Throw in the towel option?
- Replies:
**12** - Views:
**4532**

### Re: Throw in the towel option?

I definitely do not think that there should be a 'Give Up' or 'Hint' button. It would lessen the challenge and discourage perseverance. In my experience, I have encountered problems that initially I had no idea how to do and probably would have gladly clicked a hint or give up button, but after some...

- Wed Jul 03, 2013 10:00 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 253
- Replies:
**1** - Views:
**1846**

### Problem 253

Could someone verify these numbers:

For n=30, M=2, the number of possibilities are 7968620985557942272

for n=50, M=2, the number of possibilities are 252563827221661992872589320519680

For n=30, M=2, the number of possibilities are 7968620985557942272

for n=50, M=2, the number of possibilities are 252563827221661992872589320519680

- Sun Apr 28, 2013 8:29 am
- Forum: Recreational
- Topic: why don't solver annotate their solutions?
- Replies:
**8** - Views:
**8150**

### Re: why don't solver annotate their solutions?

Lol, because we're lazy! Who can be bothered to annotate their code? Often, if you understand the solution, you'll be able to understand the code, at least that's what I've experienced, unless of course they use some weird programming technique, though it'll often be mentioned in the forum and you c...

- Fri Nov 23, 2012 9:18 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 160
- Replies:
**33** - Views:
**11311**

### Re: Problem 160

Could someone please confirm this result

f(10**9) = 38144

EDIT: Solved it.

f(10**9) = 38144

EDIT: Solved it.

- Sun Nov 04, 2012 4:11 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 158
- Replies:
**11** - Views:
**4763**

### Re: Problem 158

That value is correct,I believe.PurpleBlu3s wrote:So I've returned to this problem after a while, and I wanted to check if anyone could confirm my value for n=4, 164450?

Thanks.

- Wed Oct 17, 2012 6:13 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 143
- Replies:
**26** - Views:
**9979**

### Re: Problem 143

Okay, I'll probably PM you on the weekend once I've had a good read of the solution. School often keeps me busy during the week.

- Sun Oct 14, 2012 6:47 am
- Forum: Programming languages
- Topic: What is the best language for Project Euler?
- Replies:
**14** - Views:
**20312**

### Re: What is the best language for Project Euler?

I've used python to solve all problems I've solved so far. And they pretty much all are under a minute. @PurpleBlu3s : I see your point but I'm not sure I agree. In fact *every* language is suitable for PE especially at the begining but from my own experience I solve around 120 (more or less) proble...

- Sun Oct 14, 2012 4:45 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 143
- Replies:
**26** - Views:
**9979**

### Re: Problem 143

I have another question, in regards to the solution. I've edited my original post to put the question in there, as to not waste archived posts.

- Fri Oct 12, 2012 1:15 pm
- Forum: News, Suggestions, and FAQ
- Topic: Functional requests
- Replies:
**194** - Views:
**45426**

### Re: Functional requests

Hmm, okay. I'll try those suggestions. I've only solved one problem so far with a fastest solvers table, so I'll check that out, thanks.

- Fri Oct 12, 2012 1:05 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 143
- Replies:
**26** - Views:
**9979**

### Re: Problem 143

I've posted a question on the solved forum. Could anyone please answer it?

- Thu Oct 11, 2012 10:30 am
- Forum: Recreational
- Topic: Graph of the Statistics
- Replies:
**15** - Views:
**7834**

### Re: Graph of the Statistics

The graph looks great! If there's one thing I might suggest, it's that maybe a line on the 0-100% graph could be also plotted at 2%, to give a better sense of scale of the second graph.

- Thu Oct 11, 2012 10:23 am
- Forum: News, Suggestions, and FAQ
- Topic: Functional requests
- Replies:
**194** - Views:
**45426**

### Re: Functional requests

Wow, I find that ironic that the private area is more 'active' than the public. Although it just goes to show how much you guys work on this Project :D. It's not your bad at all. Thanks :). I just didn't want to seem unappreciative of your effort, and in hindsight the suggestion was rather silly, as...

- Sun Oct 07, 2012 1:55 pm
- Forum: News, Suggestions, and FAQ
- Topic: Functional requests
- Replies:
**194** - Views:
**45426**

### Re: Functional requests

And I shall. Wow, I didn't know you guys spent so much effort trying to find an accurate difficulty measure. My bad then. Hopefully one day you'll find a way!euler wrote:Trust me when I say that we gave this a lot of thought.

- Sun Oct 07, 2012 7:26 am
- Forum: News, Suggestions, and FAQ
- Topic: Functional requests
- Replies:
**194** - Views:
**45426**

### Re: Functional requests

There's one caveat. Obviously one can only estimate a problem's difficulty correctly after having solved it. That would mean that the population that voted for a problem's difficulty isn't representative for 'the average Project Euler user'. Hmm, I hadn't thought of that! Oh, well... I wish there w...

- Sat Oct 06, 2012 2:17 pm
- Forum: News, Suggestions, and FAQ
- Topic: Functional requests
- Replies:
**194** - Views:
**45426**

### Re: Functional requests

Any difficulty rating system would be entirely meaningless, even if problems were ranked by those who solved it. Some people even have difficulty with Problem #1. How would they rank it??? Alternatively, some people have solved over 300 problems within a few weeks. How would they rank them all??? A...

- Fri Oct 05, 2012 9:20 am
- Forum: News, Suggestions, and FAQ
- Topic: Functional requests
- Replies:
**194** - Views:
**45426**

### Re: Functional requests

I have two suggestions: My first suggestion is whether we can implement a difficulty rating system for problems. Users who solve a problem can then rank the difficulty of the problem, easy medium hard or out of 5 stars etc. and on the problem page it would display the average rating, thus providing ...