Advent of Code 2020 - BaseA Style (Day 10)

[Jean-Balteryx]

Discussion thread for day 10 of the Advent of Code : https://adventofcode.com/2020/day/10

[Balders]

@patrick_digan thanks, I now realise it was completely redundant if you see my second soln. and it should generalise to if there were 2-jumps as well.

[Steph_Maddrell]

Well part A was easy!

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I spotted the binary in part B but it didn't help! I spent a while trying to figure out the formula but caved and ended up adding in a lookup table which maps the number of 1s between the 3s to the number of possibilities. It's lucky there were no 2 jumps otherwise my head might've exploded.

[dsmdavid]

Went the macro route because I couldn't think the non-macro way for part II. Should work for random jolt diff (of 2 or longer) or as well. The main limitation I see is the number of steps between the checkpoints should not be massive (or the iterative could be heavy, it's ok for the current dataset). 

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[estherb47]

Is it cheating that I had to read through the reddit too to understand the trick of part two?

Still macro-less on the challenges....

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[Jean-Balteryx]

I couldn't have done it without @jdunkerley79 hint. You truly are impressive !

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