## Search found 56 matches

- Sat Feb 15, 2020 4:37 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 023
- Replies:
**56** - Views:
**17829**

### Re: Problem 023

Hello guys, I started to solve Project Euler problems recently, I wrote below code to prevent adding duplicate items to collection but it returns incorrect answer at the end. I have merged your post with the existing topic for Problem 23. Please do not post code (or other aids to solving) in this f...

- Wed Feb 12, 2020 8:03 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 610
- Replies:
**18** - Views:
**4904**

### Re: Problem 610

The question states The rules do not place any restriction on the number of occurrences of M, so all integers have a valid representation. but doesn't explain how to get negative integers, and I got the tick with an answer which assumes that negative integers don't have a valid representation. I th...

- Tue Jan 21, 2020 9:24 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 597
- Replies:
**3** - Views:
**208**

- Sat Jan 04, 2020 9:04 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 684
- Replies:
**4** - Views:
**948**

### Re: Problem 684

Do you have to find the smallest digit sum for each term of the fibonacci sequence from the 2nd to the 90th? No, that is not correct. $S(n)$ is not digitsum. Instead, $s(n)$ is the inverse digit sum, so $\mathrm{digitsum}(s(n)) = n$. Note also that $S$ is the sum of $s$. So, (given a Fibonacci numb...

- Mon Nov 18, 2019 7:04 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 688
- Replies:
**7** - Views:
**734**

- Mon Nov 18, 2019 7:40 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 689
- Replies:
**3** - Views:
**681**

### Re: Problem 689

Your values of $f$ are correct (albeit with the interpretation of the $\pi^2/6$ value as a limiting case, because $f(x)$ is only defined if $x$ is strictly less than 1).

For answer format, the leading zero is required, as in 0.abcdefgh

For answer format, the leading zero is required, as in 0.abcdefgh

- Fri Oct 18, 2019 4:34 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 679
- Replies:
**2** - Views:
**667**

### Re: Problem 679

Yes, it counts as two occurrences.LangerJan wrote: ↑Fri Oct 18, 2019 9:43 amProblem 679(View Problem)

Quick question about counting keywords: Does "AREAREA" count as two occurrences of "AREA"?

- Thu Oct 03, 2019 6:25 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 570
- Replies:
**1** - Views:
**461**

- Mon Sep 23, 2019 5:31 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 669
- Replies:
**5** - Views:
**3708**

### Re: Problem 669

At this point, I'm about 1 step away from challenging the answer to this problem. I know a fair number of people have already solved this problem. I know I have everything in correctly, the program appears to operate just fine. I've done just about everything I can. Next step is to verify each step...

- Wed Aug 14, 2019 6:02 pm
- Forum: News, Suggestions, and FAQ
- Topic: Bookmark / Pinning a problem?
- Replies:
**26** - Views:
**4098**

### Re: Bookmark / Pinning a problem?

To answer your original question, the Project Euler site does not currently have any specific functionality for bookmarking problems (except for "filter by solved/unsolved"). The work-around I suggested earlier of using browser bookmarks may still be viable for the cross-device use case that you des...

- Sun Aug 11, 2019 5:49 pm
- Forum: News, Suggestions, and FAQ
- Topic: Bookmark / Pinning a problem?
- Replies:
**26** - Views:
**4098**

### Re: Bookmark / Pinning a problem?

Your web browser's bookmarking facility should be adequate for this job.

- Mon Jul 29, 2019 6:54 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 122
- Replies:
**14** - Views:
**5745**

### Re: Problem 122

Yes, your reasoning is correct.RishadanPort wrote: ↑Sun Jul 28, 2019 5:31 pmIs m(1) considered 0 or 1?

I'm assuming 0 becomes you don't need any multiplication

- Mon Jul 29, 2019 6:43 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 351
- Replies:
**19** - Views:
**8999**

### Re: Problem 351

This question would be better asked in the solutions thread for this problem on the main site.RishadanPort wrote: ↑Mon Jul 29, 2019 6:34 amok I solved this problem...

I am really wondering tho, why H(1000), H(1 000 000), and H(100 000 000) all look so similar... Can anyone explain? feel free to send me private message.

- Tue Jul 16, 2019 6:30 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 351
- Replies:
**19** - Views:
**8999**

### Re: Problem 351 Visibility of extremely far away orchard

Let the middle orchard represent (0, 0). if I have say an orchard that is on the X-Axis shifted (100 000 000 - 1) away but shifted up or below by 1, -- do I assume I can see this orchard even tho the line is extremely close to just horizontal line? I am guessing all orchards are points with no widt...

- Thu May 09, 2019 9:06 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 653
- Replies:
**2** - Views:
**2884**

### Re: Problem 653

My problem that I've realised that if two particles were to move toward each other while they are an odd number of millimetres away, they would meet at a point with half-integer position ( with a .5); which seemingly goes against what the rest of the problem is implying i.e that all values are inte...

- Mon Apr 22, 2019 7:09 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 013
- Replies:
**76** - Views:
**23420**

- Tue Feb 19, 2019 8:48 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 656
- Replies:
**9** - Views:
**1833**

### Re: Problem 656

No, that is still not the purpose of this forum.

As Animus said, "it is not appropiate to ask for help for recent problems that have not even reached 100 solvers".

- Fri Feb 01, 2019 6:27 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 090
- Replies:
**46** - Views:
**14191**

### Re: Problem 090

For the purposes of this problem, an "arrangement of two cubes" means a set of two cubes, where each cube is a set of six digits. Thus your "set of sets" interpretation is correct. If two "arrangements of two cubes" are found to differ from one another only be reordering the cubes, or by reordering ...

- Sun Nov 18, 2018 11:46 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 643
- Replies:
**8** - Views:
**3448**

- Fri Nov 16, 2018 10:02 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 420
- Replies:
**11** - Views:
**5225**

### Re: Problem 420

To be clear: 'squaring' a matrix refers specifically to matrix multiplication of a matrix with itself.