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this post was submitted on 02 Dec 2024
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d8: done, and nothing to say about it.
day 8 part 2
Eric added some
0s in the grid which fucked up my existence code, sneaky devilI almost got done in by floating point arithmetic, I think
8-2 commentary
Used 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.