## Search found 18 matches

Fri Feb 26, 2016 6:00 am
Forum: News, Suggestions, and FAQ
Topic: Dark Theme
Replies: 0
Views: 1079

### Dark Theme

What happened to the dark theme? I really liked it and hate staring at all this white.
Mon Nov 05, 2012 4:07 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 388
Replies: 11
Views: 4004

### Re: Problem 388

I had the same problem as the OP. I think that the words "from" and "to" imply endpoints (at least for me they did). Also, something else seems weird about the wording, but I can't put my finger on it.
Wed Mar 23, 2011 6:29 pm
Forum: Recreational
Topic: 1 second rule
Replies: 12
Views: 5434

### Re: 1 second rule

hk wrote:Not all problems can be solved within a second though, even with the best algoritm.
In fact every problem can be solved within a minute using a compiled language.
Really? Would you care to challenge us with an example then?
Wed Mar 23, 2011 5:55 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 070
Replies: 24
Views: 7507

### Re: Problem 070

I'm not sure what to do about this, but I believe I might have a significant contribution for this problem and problem 72. For 70, I get these times: Upper bound 10^7: about .6 seconds Upper bound 99999900: about 6 seconds For 72: Upper bound 10^6: .05 seconds Upper bound 10^7: .60 seconds Upper bou...
Mon Mar 21, 2011 12:01 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 329
Replies: 16
Views: 4978

### Re: Problem 329

I think I'm close. My random generator is slightly off from my proper solution though. Are these correct:
Probability of "P" == 119/300
"PP" == 230/1497
"PNPN" == 21271/322704
Sat Mar 19, 2011 10:06 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 100
Replies: 57
Views: 14984

### Re: Problem 100

You probably have a precision problem. In Windows Calculator I get:
0.49999999999999999998596550493372

Edit: Try thinking of a way to do the problem so that precision is not even a factor. You'll just need to find the pattern.
Fri Mar 18, 2011 1:30 am
Forum: News, Suggestions, and FAQ
Topic: Total Beginner
Replies: 8
Views: 4591

### Re: Total Beginner

I vote for C++. I must say I'm a little biased though. Here's another tutorial: http://www.cplusplus.com/doc/tutorial You'll also need to download an IDE. I don't know any that would definitely work for Ubuntu. Try googling. Almost any language would work for Project Euler. If you like the look of C...
Tue Mar 15, 2011 4:19 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 313
Replies: 21
Views: 6879

### Re: Problem 313

Got the answer. My first method was based on a false assumption. I didn't have my compliler so I had to use codepad to test the code. Still a very easy, but still satisfying problem.

One more till L3
Sun Mar 13, 2011 7:47 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 313
Replies: 21
Views: 6879

### Re: Problem 313

My method doesn't generate pairs, just the number of solutions for each p 2 . Based on my methods, though, the pairs should be S(2, 7), S(3, 6), S(4, 5), S(5, 4), S(6, 3), S(7, 2). I feel like I might be giving away too much. Edit: Hm, maybe not. S(7, 2) doesn't seem to give 25 if I do it by hand, I...
Sun Mar 13, 2011 2:17 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 313
Replies: 21
Views: 6879

### Re: Problem 313

I've refined my methods, but now I am getting 16442. I notice that it is very close to 3 times the example case, but I'm guessing it's just coincidence. Can you tell me how much these numbers are off by? p 2 = 9, solutions = 2 p 2 = 25, solutions = 6 p 2 = 361, solutions = 90 p 2 = 1849, solutions =...
Sat Mar 12, 2011 3:31 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 313
Replies: 21
Views: 6879

### Re: Problem 313

I tried this problem today and quickly found a generating function (I think). My C++ code is 30 lines long. This problem seems way too easy to be 300+, at least the way I'm approaching it. Could it really be that simple? Also, are S(314, 272) and S(272, 314) considered distinct. Logically it seems t...
Mon Mar 07, 2011 3:06 am
Forum: Resources
Topic: Paper/Pencil Problems
Replies: 71
Views: 56644

### Re: Paper/Pencil Problems

Problem 207 (view problem) is one of the easier ones on paper I think.
Fri Mar 04, 2011 11:22 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 317
Replies: 38
Views: 11813

### Re: Problem 317

Hello, I did this problem with pencil/paper and figured the final anwer with my TI-83. I think there's a chance I lost accuracy by using the calculator. I think my method is correct, but I made one assumption in my calculus. That could also be the problem. Could I pm someone to see if my answer is c...
Tue Feb 08, 2011 5:48 pm
Forum: Clarifications on Project Euler Problems
Topic: problem 055
Replies: 31
Views: 8427

### Re: problem 055

I think the wording should be changed to "How many probable Lychrel numbers are there below ten-thousand?"
If a number satisfies the conditions presented int the question then the number is a probable Lychrel number.
None are actually known to exist.
Mon Jan 31, 2011 2:29 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 144
Replies: 20
Views: 7412

### Re: Problem 144

Coordinates to the nearest hundredth are as follows:
second: (-3.99, -6.02)
ninth: (3.29, 7.53)
thirty-third: (-4.10, -5.74)
Sat Jan 22, 2011 2:37 am
Forum: Programming languages
Topic: c++ numbers out of range
Replies: 9
Views: 6197

### Re: c++ numbers out of range

Thank you for your replies. I did enjoy coming up with an algorithm for those problems. I realize it would be ridiculous to try 97 with bignums.
Sat Jan 22, 2011 2:28 am
Forum: News, Suggestions, and FAQ
Topic: Fastest Solvers
Replies: 21
Views: 9630

### Re: Fastest Solvers

I like the Eulerlians section, but it seems a shame that previous bests aren't recognized somewhere. How about a page for the top 100 highest scores with the best rank achieved
Example:
Name: Anton_Lunyov
Highest score achieved: 177
Highest rank achieved: 1
Thu Jan 20, 2011 2:24 am
Forum: Programming languages
Topic: c++ numbers out of range
Replies: 9
Views: 6197

### Re: c++ numbers out of range

Welcome to PE latinpower! C++ also has 64-bit integers ("long long" or "__int64" depending on which implementation you use). As a principle, you don't need any bigInt or bigNum libraries to solve the PE problems (but you do need to know the limitations imposed by each type and take those limitation...