Search found 36 matches

by timday
Tue Aug 27, 2019 9:57 am
Forum: News, Suggestions, and FAQ
Topic: About Statistics-->Countries
Replies: 6
Views: 748

Re: About Statistics-->Countries

Aha, I'd been wondering about this since a browser tab I had open on the old https://projecteuler.net/country=Scotland page broke and I found it again at https://projecteuler.net/location=Scotland . This thread solves the mystery... I'd suspected it was probably something related to territorial clai...
by timday
Wed Nov 28, 2018 11:15 pm
Forum: Recreational
Topic: Project Euler - Learning to code efficiently
Replies: 2
Views: 6200

Re: Project Euler - Learning to code efficiently

I would not say that Project Euler (PE) will teach you to code efficiently; more that you will need to learn to code efficiently to solve Project Euler problems. PE itself doesn't actually give you much to show you what efficient coding looks like (apart from some hints about prime sieving in PDFs a...
by timday
Sat Apr 11, 2015 5:01 pm
Forum: Recreational
Topic: I just started project euler like 2 days ago.
Replies: 9
Views: 3142

Re: I just started project euler like 2 days ago.

Nice. Bit loud for me; does make me wonder about other PE logo-ed things though: a PE lapel pin maybe? Or a PE mug (with an Euler picture or some other suitably Euler-ish decor on the other side)? OEIS (if you haven't come across it yet in your Project Euler journey... you will!) were having a bit o...
by timday
Sun Mar 29, 2015 1:06 pm
Forum: Recreational
Topic: Favorite Problem?
Replies: 5
Views: 6255

Re: Favorite Problem?

Thanks for explaining your philosophy MuthuVeerappanR. Elsewhere (maybe a thread on this board) I've commented that (IMHO) Project Euler has similarities with sports like rock climbing or mountaineering where most of the competition is "with yourself" and you define your own criteria for a success; ...
by timday
Sun Mar 29, 2015 12:33 am
Forum: Recreational
Topic: Favorite Problem?
Replies: 5
Views: 6255

Re: Favorite Problem?

Hmmm...MuthuVeerappanR you claim to have solved problems using 12 hours and 2.5 days of computing time? Might I suggest that you might be missing the point of Project Euler? Personally I'd be unhappy submitting a solution to the site unless I had computed it in the requisite minute (those who can, s...
by timday
Sun Nov 17, 2013 5:29 pm
Forum: Recreational
Topic: Jobs
Replies: 2
Views: 3745

Re: Jobs

I haven't seen enough job related traffic on this forum to make me think there's a need for a separate board on the topic. domdomdom's original post just makes me think "you need a more challenging job". Go and read some of Csikszentmihalyi's stuff on the state of mind called "flow" ( http://en.wiki...
by timday
Mon Apr 15, 2013 2:28 pm
Forum: Recreational
Topic: Happy Birthday Leonhard Euler!!
Replies: 1
Views: 2024

Re: Happy Birthday Leonhard Euler!!

My wife just noticed today's Google Doodle marking Leonhard Euler's birthday:

"Look, it's Leonhard Euler! ... He's your nemesis! ... I mean hero!"

(Actually, I think nemesis was probably about right...)
by timday
Wed Apr 03, 2013 9:19 pm
Forum: Recreational
Topic: Solution threads at the forum. Are they important for you ?
Replies: 4
Views: 5077

Re: Solution threads at the forum. Are they important for yo

What makes me really happy is seeing a bunch of other folks posting things like "hardest one yet" when I finally crack a really head-bangingly tough one. Good! Not just me then! The other more pragmatic thing is picking up other mathematical techniques/tricks useful for solving (later) problems whic...
by timday
Wed Apr 03, 2013 9:04 pm
Forum: Recreational
Topic: Physics site like Project Euler?
Replies: 5
Views: 5511

Re: Physics site like Project Euler?

That would be pretty cool. I do find I have more affinity for the PE problems which are a bit more on the applied side (geometrical or probability ones mainly). Recently I needed to revise my knowledge of FFTs and my first instinct was to look for a PE problem involving them... but apparently there ...
by timday
Mon Feb 25, 2013 7:30 pm
Forum: Programming languages
Topic: Interesting Observation
Replies: 3
Views: 3208

Re: Interesting Observation

notfruit wrote: > Some people prefer to stick with a language (like c++) even though they don't need all the bulk of the language I suspect there could be a substantial number of people using PE as a platform to explore/learn new languages as there are people using their "day job" language. I was aw...
by timday
Fri Oct 05, 2012 11:25 pm
Forum: Programming languages
Topic: Scratch?
Replies: 3
Views: 3840

Re: Scratch?

Nice one; wondered when we'd see some Scratch-ing on PE. Can see the difficulty in posting solutions in the forum though! Having watched some friend's bright kid get into programming through Scratch, I think it's an absolutely fantastic tool for learning; the snap-together blocks sidestep many of th...
by timday
Thu Oct 04, 2012 6:00 pm
Forum: Recreational
Topic: Graph of the Statistics
Replies: 15
Views: 7504

Re: Graph of the Statistics

Semi-related to this, some stuff I did a while ago from stats on participants by country at http://www.bottlenose.demon.co.uk/article/euler/index.htm#participants (bear in mind this was back in the day of the old 50-problem "levels"), and also at http://www.bottlenose.demon.co.uk/article/euler/index...
by timday
Mon Sep 03, 2012 10:27 pm
Forum: Recreational
Topic: 1 minute contest variant
Replies: 3
Views: 2691

Re: 1 minute contest variant

Indeed. With AWS EC2 spot instances available for under 1c per hour, it's presumably entirely possible for anyone with the solution code available to script the marshalling of enough instances to have claimed to solve the entire lot in however much time their longest solution takes for just a few do...
by timday
Sat Apr 14, 2012 12:54 pm
Forum: Applied Mathematics
Topic: Any PE problems requiring Fourier Transform/FFT to solve ?
Replies: 1
Views: 6463

Any PE problems requiring Fourier Transform/FFT to solve ?

I'm curious whether there are any Project Euler problems which require a Fourier Transform to solve, either because the solution implementation actually includes FFT code, or because some analytic treatment involving FT reveals something needed for a solution. No need to give a problem number if it ...
by timday
Fri Apr 13, 2012 12:38 pm
Forum: Recreational
Topic: Alcohol and problem solving
Replies: 4
Views: 3065

Alcohol and problem solving

This recently published research cannot go unremarked: Drinking Alcohol May Significantly Enhance Problem Solving Skills Does this square with anyone's experience ? While I'm partial to "a wee dram" on the side during a late evening problem solving session, I can't say I'd claim it was particularly ...
by timday
Fri Apr 06, 2012 10:57 pm
Forum: Recreational
Topic: Visual artefacts of Project Euler coding
Replies: 8
Views: 5545

Re: Visual artefacts of Project Euler coding

The poster was made with LaTex and the "beamerposter" package. I use LaTeX from the texlive distribution included in Debian (install texlive-full to pull in everything ). More about beamerposter (and some other examples): http://www-i6.informatik.rwth-aachen.de/~dreuw/latexbeamerposter.php ; I actua...
by timday
Wed Apr 04, 2012 12:00 pm
Forum: Recreational
Topic: Visual artefacts of Project Euler coding
Replies: 8
Views: 5545

Re: Visual artefacts of Project Euler coding

Hmmm thanks that's very interesting information. I do probably tend to overruse BigInt; if there is any doubt about whether a problem will fit into 64bit "Long" range, I'll generally start off using a BigInt through until it becomes clear that I need some more performance to get a sub-minute solutio...
by timday
Mon Apr 02, 2012 11:00 pm
Forum: Recreational
Topic: Visual artefacts of Project Euler coding
Replies: 8
Views: 5545

Re: Visual artefacts of Project Euler coding

My employer held a poster session for people to show off their "side projects" and CPD activities. Mine was based on my experiences solving Project Euler with Scala.
by timday
Sun Mar 11, 2012 5:52 pm
Forum: Recreational
Topic: Which PE problems were the most satisfying for you to solve?
Replies: 13
Views: 8272

Re: Which PE problems were the most satisfying for you to so

For me, amount of satisfaction seems to be highly correlated with the amount of time I was seriously stuck on the problem. Getting the green tick is then like finally escaping some horrible ordeal. Top 3 are probably 152 ("Writing 1/2 as a sum of inverse squares"), 160 ("Factorial trailing digits") ...
by timday
Thu Mar 01, 2012 10:40 pm
Forum: Recreational
Topic: Understanding the Universe
Replies: 14
Views: 6796

Re: Understanding the Universe

A "something" which "exists outside time" eh ? What if that something is simply "mathematics" ? Max Tegmark has written a fair bit on this theme (a synopsis would be: "The only postulate in this theory is that all structures that exist mathematically exist also physically" in other words mathematica...