Search found 9 matches

by Circling
Sun Jul 25, 2021 8:51 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 607
Replies: 1
Views: 67

Problem 607

Link to the problem: Problem 607 (View Problem)

"10 decimal places" is used here to mean ten digits after the point (1a.bcdefghijk), but it can also be understood to mean ten digits in total (1a.bcdefghi). That could use some clarification.
by Circling
Mon Jul 05, 2021 7:13 am
Forum: Number Theory
Topic: Brocard's problem has finite solution(?)
Replies: 1
Views: 7942

Re: Brocard's problem has finite solution(?)

The claim that $(5+1)(5+2)(5+3)...(5+s)=O(5^{k})$ is false. Big O notation requires the ratio between the two functions have a maximum value when given the same input. Since the first function is multiplied by a number bigger than five, while the other is multiplied by 5, this means that $\lim_{x \t...
by Circling
Mon Jun 14, 2021 4:03 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 227
Replies: 41
Views: 17462

Re: Problem 227

The answer is of the form xxxx.xxxxxx . I think the difference between "significant figures" and "digits after the decimal point" should be made clearer, since that difference made me waste half an hour with stuff like Monte Carlo simulations and Python's fractions library to dea...
by Circling
Sat May 08, 2021 8:51 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 513
Replies: 5
Views: 3457

Re: Problem 513

As you state yourself: that is a well known convention . Is there any need to repeat such a convention? Anyhow, members in doubt can read your post and all is well. Well considering that I came here because I was confused, and another user got confused as well, yes it might need to be made clearer.
by Circling
Fri Apr 30, 2021 3:00 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 293
Replies: 10
Views: 5074

Re: Problem 293

Can someone verify the following info? Sum of distinct PFN for n below 10 ** 2: 17 Sum of distinct PFN for n below 10 ** 3: 50 Sum of distinct PFN for n below 10 ** 4: 109 Are the admissable numbers supposed to be less than 10 ** 9, or is the problem asking for the sum of all different PF numbers be...
by Circling
Mon Apr 19, 2021 3:58 pm
Forum: Clarifications on Project Euler Problems
Topic: problem 267
Replies: 16
Views: 9011

Re: problem 267

I have a problem concerning this "maximize your chances". Usually there is the notion of expectation value. I guess it does not apply here, as then in my opinion we would have f=1. But what is then to be maximized? Is it the number of the different possible outcomes of the 1000 tosses whe...
by Circling
Fri Mar 05, 2021 9:04 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 151
Replies: 29
Views: 17716

Re: Problem 151

So here is how I understand how the "cut in half" procedure works: Step one: Pull out a paper from the envelope. In this case, it is an A2 paper. Step two: Cut the A2 to get two A3's Step three: Cut one of the A3's to get two A4's Step four: Cut one of the A4's to get two A5's Step five: T...
by Circling
Tue Feb 23, 2021 5:43 pm
Forum: Programming languages
Topic: Scratch?
Replies: 4
Views: 5299

Re: Scratch?

Depends on how big the numbers in the problem are. For example, if you try to calculat 3 ** 34 by repeatedly multiplying a variable 34 times you get an even number (which is obviously wrong, powers of 3 cannot be even) I think that if you are careful and all numbers are below 3 ** 33 it should be mo...
by Circling
Sun Dec 06, 2020 5:04 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 349
Replies: 1
Views: 2351

Re: Problem 349

Anyone trying to use Golly to solve this: The ant itself is counted in the population when it's on a white square, but not when it's on a black square. Learned it the annoying way.