Search found 65 matches

by RobertStanforth
Sun Nov 22, 2020 2:35 pm
Forum: News, Suggestions, and FAQ
Topic: projecteuler.chat unfindable
Replies: 1
Views: 31

Re: projecteuler.chat unfindable

There is a link to this .chat forum on the main site's "About" page, in the section "How do I access the alternative forum?".
(You have to be logged in to see it.)
by RobertStanforth
Sun Oct 18, 2020 5:13 pm
Forum: News, Suggestions, and FAQ
Topic: Where can I see which Awards I earned?
Replies: 1
Views: 401

Re: Where can I see which Awards I earned?

Johohn wrote: Sun Oct 18, 2020 4:16 pm Please help me, I don't find which Awards I've earned, I only see how many I earned in "Friends".
It can be found under your "Progress" page.
From there you will see five sub-tabs: "Problems", "Levels", "Awards", "Posts", "History".
by RobertStanforth
Mon Sep 28, 2020 11:58 am
Forum: News, Suggestions, and FAQ
Topic: Error in solution to problem 8
Replies: 1
Views: 281

Re: Error in solution to problem 8

Hi hbhatia, Welcome to Project Euler! I have verified that the answer on the site for 8 is indeed correct. Note also that it has been solved by 351674 people already. If you'd like to send me a private message with which 13 adjacent digits of the 1000-digit number give rise to your answer, I'll take...
by RobertStanforth
Sun Sep 20, 2020 1:40 pm
Forum: Recreational
Topic: Not appearing on the fastest solver's list
Replies: 3
Views: 415

Re: Not appearing on the fastest solver's list

NaoisTheGuardian wrote: Sun Sep 20, 2020 12:35 pm Ah, thank you! I'll just have to try and get on the next problem's list haha
No worries! It's applied retroactively, so you are now appearing in the list for 726 at 52nd.
by RobertStanforth
Sun Sep 20, 2020 12:29 pm
Forum: Recreational
Topic: Not appearing on the fastest solver's list
Replies: 3
Views: 415

Re: Not appearing on the fastest solver's list

Hi. I recently completed problem 726. I was 51st or 52nd to solve it, but my username hasn't appeared on the list. I can't think of any reason this might have happened other than that I am currently not yet level 1? Anyway, thanks in advance. Welcome to Project Euler! In order to appear in the "fas...
by RobertStanforth
Sun Aug 30, 2020 12:18 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 100
Replies: 2
Views: 574

Re: Problem 100

Yasha13 wrote: Sat Aug 29, 2020 11:19 pm I am sure (99.99%) that solved correctly Problem 100.
But the system said that my answer is wrong.
Could someone let me know if the system recognizes his\her solution as correct?
Thank you.
I have verified that the system accepts the correct answer for this one.
by RobertStanforth
Fri Jul 24, 2020 8:26 am
Forum: News, Suggestions, and FAQ
Topic: Errors/Warnings/Bugs
Replies: 579
Views: 178996

Re: Errors/Warnings/Bugs

Hi, I am having trouble opening the thread for Problem 497. Chrome would load a few posts but when I scrolled down further, it became just a blank screen. Maths formulas were not rendered and code sections would not open. Thank you for reporting this. I cannot load the thread either: the Chrome tab...
by RobertStanforth
Fri May 22, 2020 9:33 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 298
Replies: 18
Views: 7696

Re: Problem 298

Thanks for flagging. This is now fixed.
by RobertStanforth
Thu Apr 09, 2020 6:29 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 618
Replies: 8
Views: 3859

Re: Problem 618 - optimization

I'm feeling stuck on this problem and want to learn more with some help. I have edited this post to remove potential spoilers, and moved it to the already existing topic for Problem 618 - see the red banner text at the top of this page. Good luck solving the problem! If successful, you'll be able t...
by RobertStanforth
Sat Feb 15, 2020 4:37 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 023
Replies: 56
Views: 24540

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...
by RobertStanforth
Wed Feb 12, 2020 8:03 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 610
Replies: 18
Views: 7663

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...
by RobertStanforth
Tue Jan 21, 2020 9:24 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 597
Replies: 3
Views: 1401

Re: Problem 597

aTree wrote: Tue Jan 21, 2020 7:00 am Is this log base 10 or base e?
You can take it to be base $e$ ... but actually it doesn't matter because a different base would just scale all speeds by the same constant without affecting the sequence of events.
by RobertStanforth
Sat Jan 04, 2020 9:04 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 684
Replies: 13
Views: 5296

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...
by RobertStanforth
Mon Nov 18, 2019 7:04 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 688
Replies: 8
Views: 2728

Re: Problem 688

vamsikal3 wrote: Mon Nov 18, 2019 6:07 am The problem text reads: It is impossible to divide 10 into 5 non-empty piles and hence f(10,5)=0.
Thank you for pointing this out. The wording has now been amended.
by RobertStanforth
Mon Nov 18, 2019 7:40 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 689
Replies: 3
Views: 1618

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
by RobertStanforth
Fri Oct 18, 2019 5:34 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 679
Replies: 2
Views: 1382

Re: Problem 679

LangerJan wrote: Fri Oct 18, 2019 10:43 am Problem 679 (View Problem)

Quick question about counting keywords: Does "AREAREA" count as two occurrences of "AREA"?
Yes, it counts as two occurrences.
by RobertStanforth
Thu Oct 03, 2019 7:25 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 570
Replies: 1
Views: 988

Re: Problem 570

voltara wrote: Thu Oct 03, 2019 2:03 am The problem description for 570 contains a broken image; the filename is misspelled "p570-slowflakes.png" instead of "p570-snowflakes.png".
Thank you for letting us know. The broken image has now been fixed.
by RobertStanforth
Mon Sep 23, 2019 6:31 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 669
Replies: 5
Views: 4838

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...
by RobertStanforth
Wed Aug 14, 2019 7:02 pm
Forum: News, Suggestions, and FAQ
Topic: Bookmark / Pinning a problem?
Replies: 26
Views: 9119

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...
by RobertStanforth
Sun Aug 11, 2019 6:49 pm
Forum: News, Suggestions, and FAQ
Topic: Bookmark / Pinning a problem?
Replies: 26
Views: 9119

Re: Bookmark / Pinning a problem?

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