Search found 339 matches

by rayfil
Sat Sep 07, 2019 12:16 am
Forum: News, Suggestions, and FAQ
Topic: Errors/Warnings/Bugs
Replies: 519
Views: 101019

Re: Errors/Warnings/Bugs

He most probably mean images normally displayed as part of someone's signature at the very bottom of each post. I can't see those images either, appearing only as an image icon with the title "image". A link had been posted by Jochen_P previously in this thread on Wed, 21 Aug 2019. That link is stil...
by rayfil
Fri Jul 26, 2019 2:13 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 432
Replies: 7
Views: 1905

Re: Problem 432

Another way of saying "last 9 digits" would be mod(1,000,000,000).
by rayfil
Wed Jan 23, 2019 3:06 am
Forum: News, Suggestions, and FAQ
Topic: Weird runtime behavior
Replies: 8
Views: 1953

Re: Weird runtime behavior

As LilStalker pointed out, the timing differences should not be considered significant. And: with the "else if(i % 2 == 0) return false;" instruction in your IsPrime function, you were disregarding further processing of all even numbers anyway. (BTW, that instruction becomes redundant in your 'impro...
by rayfil
Thu Nov 15, 2018 4:11 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 008
Replies: 98
Views: 19888

Re: Problem 008

This seems to leave you with at least two choices if you want to continue enjoying solving problems on Project Euler. i.e.: A. Continue learning how to use the C programming language. Many other participants have already succeeded solving those problems using that language. B. Start learning some ot...
by rayfil
Tue Aug 15, 2017 4:10 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 054
Replies: 66
Views: 19246

Re: Problem 054

th72
Send me a PM with your list and I'll try to have a look at it.
by rayfil
Wed May 03, 2017 5:17 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 054
Replies: 66
Views: 19246

Re: problem 54 needs updated wording

Being a new member on this forum, please be advise that problem numbers are listed with leading "0s" to provide a 3-digit number in order to facilitate archiving and easier searching.
by rayfil
Fri Sep 30, 2016 9:21 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 173 & 174
Replies: 41
Views: 11989

Re: Problem 173 & 174

The example simply shows you two different ways (not ONE unique way) which would produce a square lamina as defined, using 32 square tiles. Those two would be part of the 41 different hollow laminea you could produce when you use any quantity of square tiles up to 100 in Problem 173.
by rayfil
Wed Aug 31, 2016 4:18 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 210
Replies: 69
Views: 20023

Re: Problem 210

Steve N If your 'long' is a 64-bit float, have a look at this previous post on page 2 of this thread (http://projecteuler.chat/viewtopic.php?f=50&t=1111&start=15#p10571) and also at japp's post at the very top of the same page. I know it's a long thread (5 pages) but you would most probably have fou...
by rayfil
Wed May 04, 2016 4:50 pm
Forum: News, Suggestions, and FAQ
Topic: LinkedIn integration
Replies: 1
Views: 1142

Re: LinkedIn integration

It would be nice to be able to post level and/or other badges as certification PE cannot certify anything. There are too many on-line sites where one can get answers to PE problems and PE has no means to verify the honesty of those entering answers. YOU are the only one who really knows what you ma...
by rayfil
Fri Apr 01, 2016 11:47 pm
Forum: News, Suggestions, and FAQ
Topic: post solution
Replies: 4
Views: 2870

Re: post solution

how or where do I post a private thread or a new thread? This all depends on the subject you want to cover in such a thread. If related to a specific PE problem: - You cannot start any new thread on the main PE site; you can only post in the existing problem thread after you have solved the problem...
by rayfil
Mon May 18, 2015 9:52 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 100
Replies: 57
Views: 14653

Re: Problem 100

If you use Windows calculator, your numbers would yield 0.49999999999999999475168631829448.

I would think you have a precision problem.
by rayfil
Fri Jan 02, 2015 6:42 pm
Forum: Programming languages
Topic: Assembly - push/pop registers
Replies: 4
Views: 4111

Re: Assembly - push/pop registers

I'm aware that under Windows one should push the registers ebx/edi/esi prior to facilitating .... This used to be true up to Win98. Windows seemed to drop that requirement starting at least with WinXP. I can remember one program I wrote where I popped the esi/edi registers in the wrong order and th...
by rayfil
Wed Dec 17, 2014 4:50 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 103
Replies: 38
Views: 9431

Re: Problem 103

You seem to have forgotten the 2nd rule, i.e.
ii . If B contains more elements than C then S(B) > S(C).

7+8+9 = 24 while 11+14 = 25
by rayfil
Fri Dec 12, 2014 4:31 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 008
Replies: 98
Views: 19888

Re: Problem 008

abc
def
ghi
But they must also be on the same line if you are looking at more than two items. Thus for three adjacent items, the only candidates would be:
abc, aei, adg, beh, ceg,cfi, def and ghi.
by rayfil
Mon Aug 04, 2014 3:50 am
Forum: News, Suggestions, and FAQ
Topic: How to access the PDF containing answer explanations ?
Replies: 2
Views: 4938

Re: How to access the PDF containing answer explanations ?

At this time, you can't. For your info, in case you are not yet aware of it, the site was hacked a few weeks ago and was shut down as soon as it was discovered. It is being rewritten to make it more secure and hopefully will become available within the next few weeks along with the PDFs.
by rayfil
Fri Jul 11, 2014 12:22 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 132
Replies: 6
Views: 3064

Re: Problem 132

cshung wrote:The first forty "smallest" prime factors?
Correct.
by rayfil
Wed May 21, 2014 9:00 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 008
Replies: 98
Views: 19888

Re: Problem 008

@phil88

Have you considered the second to last post before yours???
by rayfil
Fri Apr 18, 2014 1:06 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 162
Replies: 37
Views: 11691

Re: Problem 162

There's also something wrong with the formula from rayfil, the only one who explained it a bit: it's mostly weird characters like à and ¬. So could anyone explain that to me? Sorry about that mishap. This is the very first report regarding this anomaly. Something may have changed in the site script...
by rayfil
Sun Mar 09, 2014 12:55 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 100
Replies: 57
Views: 14653

Re: Problem 100

Look at the post by hk immediately previous to yours and you should have an answer to your question.
by rayfil
Fri Jan 24, 2014 5:57 pm
Forum: News, Suggestions, and FAQ
Topic: Throw in the towel option?
Replies: 12
Views: 3918

Re: Throw in the towel option?

It would be better to have a button to change the status of a solved problem back to unsolved, if you think you have cheated or that your solution is too bad. That option is available already without the need for a "button". On the main Project Euler site, click on the "Account" tab where you can s...