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Search: Posts Made By: dg211
Forum: Puzzles 2022-07-14, 09:35
Replies: 12
Views: 1,361
Posted By dg211
Yeah, I can't see any other way to read the bonus...

Yeah, I can't see any other way to read the bonus question, but that interpretation does seem to make the bonus pretty easy (a good deal easier than the main question in my view). I didn't find the...
Forum: Puzzles 2022-07-13, 21:08
Replies: 12
Views: 1,361
Posted By dg211
Seems like the bonus question would be impossible...

Seems like the bonus question would be impossible to solve the way I first interpreted it - the sum of the numbers is odd, and there are 10 numbers, so if you add the same value to each cell you will...
Forum: Puzzles 2022-07-13, 21:01
Replies: 12
Views: 1,361
Posted By dg211
A couple of clarifying questions for the bonus...

A couple of clarifying questions for the bonus part:
- are people interpreting it as meaning you add the same value k, 1 <= k <= 30000000, to each cell?
- my interpretation from the wording is that...
Forum: Puzzles 2022-06-20, 09:47
Replies: 9
Views: 1,423
Posted By dg211
My (fairly naive, single-threaded) code took...

My (fairly naive, single-threaded) code took about two and a half hours to do n=20, and it goes up by a factor of about 4 for each increase in n. By multithreading it I think I could do n=23 or even...
Forum: Puzzles 2022-06-15, 13:36
Replies: 9
Views: 1,423
Posted By dg211
To help people check their answers without...

To help people check their answers without spoiling the puzzle, these were the last two digits of each of my values for n up to 20.

00, 01, 03, 11, 35, 08, 80, 48, 14, 23, 34, 49, 46, 37, 33, 34,...
Forum: Puzzles 2022-03-05, 20:56
Replies: 7
Views: 1,643
Posted By dg211
One thing to watch out for is that I don't think...

One thing to watch out for is that I don't think the puzzle is using the standard wordle rules for repeated characters/digits.

I think in the normal wordle rules, if a character is repeated, you...
Forum: Puzzles 2022-02-23, 10:36
Replies: 21
Views: 3,338
Posted By dg211
I think whether the bonus question is harder than...

I think whether the bonus question is harder than the base question probably depends a lot on the approach you take. I was stuck for a while on 146 for the base question and nowhere near the target...
Forum: Puzzles 2022-02-22, 22:40
Replies: 21
Views: 3,338
Posted By dg211
Just curious what the smallest sets people have...

Just curious what the smallest sets people have come up with so far are?

The best I have so far are 102 and 159, but uau's post suggests <150 is possible for the starred problem.

I found this...
Forum: Puzzles 2022-02-13, 12:00
Replies: 25
Views: 3,931
Posted By dg211
The solution is up on the IBM site now, so...

The solution is up on the IBM site now, so sharing my code as SmartMersenne suggested.

The key observations I used to make it reasonably fast were:
- You can rotate the whole circle without...
Forum: Puzzles 2022-01-18, 11:04
Replies: 25
Views: 3,931
Posted By dg211
Sure, can do.

Sure, can do.
Forum: Puzzles 2022-01-17, 14:09
Replies: 25
Views: 3,931
Posted By dg211
I get the same answers for n = 9, d = 7 and n =...

I get the same answers for n = 9, d = 7 and n = 10, d = 8. It is possible to do it with a lot less computation - my single threaded C++ code took about 3.5s for n = 9, d = 7 and about 32s for n = 10,...
Forum: Puzzles 2021-09-13, 18:36
Replies: 20
Views: 5,341
Posted By dg211
Remember you can use hyphens in both strings. ...

Remember you can use hyphens in both strings.

I'm impressed people managed to get solutions that good with pen and paper, I didn't even try that approach because I thought it would be too hard.
Forum: Puzzles 2021-09-13, 10:12
Replies: 20
Views: 5,341
Posted By dg211
Yeah, I think this is one of the toughest puzzles...

Yeah, I think this is one of the toughest puzzles there has been recently.

I slightly improved the bonus solution to 147, but I'm still on 40 for the first part.
Forum: Puzzles 2021-09-07, 14:07
Replies: 20
Views: 5,341
Posted By dg211
I'd be interested to see what the best values...

I'd be interested to see what the best values people can find are. My best solutions so far are 40 and 149.
Forum: Puzzles 2021-01-27, 17:34
Replies: 36
Views: 7,915
Posted By dg211
In case it's any help to anyone trying to tackle...

In case it's any help to anyone trying to tackle the second bonus question, I've shared what I think are 2-bot solutions for N up to 762 (excluding N = 50 and N = 100 to avoid spoiling the other...
Forum: Puzzles 2021-01-25, 21:00
Replies: 36
Views: 7,915
Posted By dg211
Awesome video Kebbaj! I was planning to do...

Awesome video Kebbaj! I was planning to do something similar to see if I could spot any patterns in the solutions, but I haven't had time. From your video it doesn't look like there is an obvious...
Forum: Puzzles 2021-01-21, 10:14
Replies: 36
Views: 7,915
Posted By dg211
Thanks for verifying my solution. I checked...

Thanks for verifying my solution.

I checked your N=77 solution and it works for me :)
Forum: Puzzles 2021-01-20, 22:49
Replies: 36
Views: 7,915
Posted By dg211
Actually, to check if my code is correct, could...

Actually, to check if my code is correct, could someone please check if they are able to verify one of my solutions for a largeish N?

For example, for N = 345, I get (317, 335), (60, 169) as a 2...
Forum: Puzzles 2021-01-20, 21:46
Replies: 36
Views: 7,915
Posted By dg211
Has anyone made any progress on the second bonus...

Has anyone made any progress on the second bonus question?

My initial attempts have been largely computational, without really doing any clever analysis of the problem. I found a heuristic which...
Forum: Puzzles 2019-12-24, 09:02
Replies: 59
Views: 29,187
Posted By dg211
Brackets

I think there was some discussion earlier about whether expressions would be allowed which used brackets in such a way that they have subexpressions that can't be evaluated in a single pass without...
Forum: Puzzles 2018-11-10, 18:28
Replies: 69
Views: 8,975
Posted By dg211
Hi EdH, I haven't read your code in detail,...

Hi EdH,

I haven't read your code in detail, but based on your description I think your approach could work, but you would probably see a lot more 10 solutions before an 11 (you mentioned thousands...
Forum: Puzzles 2016-06-29, 01:26
Replies: 16
Views: 4,515
Posted By dg211
Hi, I have just submitted a solution but it is...

Hi, I have just submitted a solution but it is very close to the deadline and it sometimes takes a while to find out if your solution is correct or not. Could someone who has already got a correct...
Showing results 1 to 22 of 22

 
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