Stephan van Hulst wrote:JJ, I see yesterday's second part gave you some pause. Need any pointers?
Tim Cooke wrote:The puzzles are definitely easier this year.
Stephan van Hulst wrote:I really hate that my brain has such problems dealing with the range [-𝜋, 𝜋] of the angle 𝜃 that atan2(y,x) returns, even though the math is exactly the same it would be when the polar angle 𝜃 of my coordinates was expressed in the range [0, 2𝜋]. (...)
Liutauras Vilda wrote:Partially because got lost in parentheses
Piet Souris wrote:Easier is to remember that the Matrix of a 90 degree left rotation aroud the origin is
You just need a few translations too.
Tim Cooke wrote:I'm blaming you Liutauras for my current inability to get day 13 part 2 solved...
Piet Souris wrote:Now looking at the example in Wikipedia, thinking about that the ri and si are not unique there.
For instance, the example is about the (relative) primes 3, 4, 5, and they give -13 * 3 + 2 * 20, but why not 7 * 3 - 1 * 20? And how that would affect the minimum solution?
Tim Cooke wrote:Thanks. However I've never written a solver for that so still dunno
Earlier, I wrote:Didn't look to today's probem yet, actually just sneaked lightly, I remember something similar from 2017 where we had to do certain amount of iterations applying certain rules to the patterns and that way after N amount of iterations there appeared some Text which was essentially the puzzles answer.
Piet Souris wrote:I must confess of getting a little fed up with these exercises full of nasty user traps...