Search found 173 matches

by mpiotte
Fri May 19, 2017 2:32 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 227
Replies: 41
Views: 9988

Re: Problem 227

On page one of this thread, Robert Gerbicz says "No, read the wikipedia's article! For this problem, because the answer will be in [1000,10000) the submitted answer should be in the form: abcd.efghij (and use rounding to get the last digit)." On page two of this thread, daniel.is.fischer says "Ten ...
by mpiotte
Sun Apr 02, 2017 3:16 pm
Forum: News, Suggestions, and FAQ
Topic: "Fastest solvers" link doesn't work when not logged in + other UX improvements
Replies: 6
Views: 1452

Re: "Fastest solvers" link doesn't work when not logged in + other UX improvements

... 3.) Even though I click "Remember Me" when logging in, I get logged out quite quickly and have to enter a captcha again. I can't reproduce it reliably, though... For this item, what is probably happening is that you are connecting from different computers. Project Euler remembers only the last ...
by mpiotte
Sat Feb 04, 2017 5:32 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 578
Replies: 4
Views: 1089

Re: Problem 578

There seems to be an error in the first sentence of the problem. Any positive integer can be written as a product of prime powers: p 1 a 1 × p 2 a 2 × ... × p k a k , where p i are distinct prime integers, a i > 0 and p i < p j if i < j. A positive power of a prime can't equal 1. Tom 1 is the limit...
by mpiotte
Fri Jan 20, 2017 6:33 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 120
Replies: 17
Views: 4877

Re: Problem 120

@mdenhoed Please don't create a new thread for a problem if one already exists.
by mpiotte
Fri Jan 06, 2017 10:58 pm
Forum: News, Suggestions, and FAQ
Topic: Are overview PDFs still being written?
Replies: 1
Views: 927

Re: Are overview PDFs still being written?

After the first page the overview PDFs become very scarce... Would it be a good idea to allow solvers to write stuff and submit if (and should one be good enough it can be chosen) ? This is what the private forum for each problem is all about. The private forum allows each solver to describe his or...
by mpiotte
Tue Dec 06, 2016 11:25 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 518
Replies: 2
Views: 840

Re: Problem 518

v6ph1 wrote:Yes - there is a summation sign missing.
Changed.
by mpiotte
Sat Nov 05, 2016 3:18 am
Forum: News, Suggestions, and FAQ
Topic: Timeline feature
Replies: 4
Views: 1279

Re: Timeline feature

Actually, I can see some problems already have this information in the tooltip! However, some older problems don't seem to have the "Completed on" field present. Has there been some data loss in the past that caused this information to be lost? The date a problem was solved was not collected by the...
by mpiotte
Wed Oct 12, 2016 4:42 pm
Forum: News, Suggestions, and FAQ
Topic: Problem 563: Wrong example?
Replies: 3
Views: 1138

Re: Problem 563: Wrong example?

apovalyaev wrote:...
828*0.9 = 745.2 and 745.2 < 748. Isn't it correct?
748x1.1 = 822.8 < 828
10% larger than the smallest side is not equivalent to 10% smaller than the larger side.
by mpiotte
Wed Oct 12, 2016 3:46 pm
Forum: News, Suggestions, and FAQ
Topic: Problem 563: Wrong example?
Replies: 3
Views: 1138

Re: Problem 563: Wrong example?

In Problem 563 (Robot Welders), it's stated as an example the following: "... M(3) = 889200 ..." Is it trully correct? Or this example doesn't square with reality? Cause I found that M(3) = 619344 and three variants are 748x828, 759x816 and 782x792 748x828 is not valid because "the long side must n...
by mpiotte
Sun Sep 18, 2016 5:25 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 569
Replies: 2
Views: 953

Re: Problem 569

mctrafik wrote:...
If, the mountain peaks were on a grid, then their coordinates would be :
9 - (430, 30)
...
I would double check this value if I were you.
by mpiotte
Sat Aug 06, 2016 3:58 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 365
Replies: 9
Views: 1662

Re: Problem 365

The following is the problem: "..." 1-What are the index, lower bound and upper bound of the summation? 2- Maybe p,q and r , on these two conditions are unique, but if not , are they arbitrary? A) Do not create a new topic when one already exist. B) The summation is over all triplets (p, q, r) that...
by mpiotte
Sun Jun 05, 2016 4:26 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 563
Replies: 8
Views: 1725

Re: Problem 563

It is stated that " The target area of 889200 is the smallest area which can be manufactured in three different variants ". This number seems to be compliant with the problem requirements for M(3) and smaller than 889200 : 865800 = 888 x 975 = 900 x 962 = 925 x 936 Could someone explain why it is n...
by mpiotte
Sun May 22, 2016 10:00 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 208
Replies: 22
Views: 5956

Re: Problem 208

Can anybody tell me what "but no turning on the spot" means in the statement of problem 208? Does it mean that a path cannot include a series of 5 clockwise circular arcs or a series of 5 anticlockwise circular arcs? It means there are no sharp angle. Direction changes smoothly from one arc to the ...
by mpiotte
Sun May 15, 2016 1:55 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 512
Replies: 2
Views: 1286

Re: Problem 512

square1001 wrote:...
Is there any "memory usage is less than (int)*(500,000,000) (=1.86GB)" solution?
Yes.
by mpiotte
Thu May 05, 2016 11:47 am
Forum: News, Suggestions, and FAQ
Topic: Errors/Warnings/Bugs
Replies: 497
Views: 93937

Re: Errors/Warnings/Bugs

square1001 wrote:Problem 205

...

In line 1 and 3, this written "Peter", "Peter and Colin".
In line 4, this written "Pyramidal Pete beats Cubic Colin".

Which is correct, Peter or Pete?
Both are correct. Pete is a diminutive form of the name Peter.
by mpiotte
Sun May 01, 2016 2:17 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 557
Replies: 1
Views: 919

Re: Problem 557

Hello, everyone. I solved for $O(n^3)$ solution in $31$ minutes. I checked the thread and I think my solution and uwi's solution is same, but uwi is computed in $86$ seconds. I think 1-minute rule is unfair because computing speed is very different in different PC. What do you think? Please tell me...
by mpiotte
Thu Apr 28, 2016 12:04 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 008
Replies: 96
Views: 18124

Re: Problem 8 gripe - PE ADMINS, please address issue!

To the admins, please read my comment on the forum for Project 8 solutions. This is STILL unclear, and I was able to FINALLY solve it via a whim I had. The problem is POORLY presented and confusing for such a simple solution. Please don't create a new topic when one already exist for a problem. It ...
by mpiotte
Tue Apr 26, 2016 10:24 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 534
Replies: 1
Views: 613

Re: Problem 534

Hi! Can someone please help me solve this problem in Wolfram Mathematica? I've seen people post solutions using c++, python, java, and so on but none in Mathematica. Mathematica isn't really my cup of tea(to be perfectly honest, I haven't got a clue about it at all) and I really need to do this for...
by mpiotte
Tue Apr 26, 2016 11:38 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 546
Replies: 2
Views: 811

Re: Problem 546

I have spent a lot of time on this one. Is there some mathematical theorem or concept I need to read first to solve this. Please suggest something to read for this, if there is. This problem is challenging, but it can still be solved using only simple principles already used in dozens of other Proj...
by mpiotte
Tue Apr 26, 2016 12:41 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 493
Replies: 5
Views: 2252

Re: Problem 493

sheepweevil wrote:Are the balls drawn with or without replacement? It's not clear to me from the problem description.
Without replacement.