this post was submitted on 02 Dec 2024
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[–] gerikson@awful.systems 4 points 2 weeks ago (1 children)

day 8 part 2

Eric added some 0s in the grid which fucked up my existence code, sneaky devil

[–] Architeuthis@awful.systems 2 points 2 weeks ago* (last edited 2 weeks ago)

I almost got done in by floating point arithmetic, I think

8-2 commentaryUsed the coordinates of every two same type frequences to create the ilnear equation (y = ax + b) and then fed it all the matrix coordinates to see which belonged to the line. To get the correct number of antinodes I had to check for |y - ax - b| < 0.0001, otherwise I got around 20 too few.