Advent of Code 2021 Day 2 (BaseA Style) - Dive!

[jdunkerley79]

Discussion thread for day 2 of the Advent of Code - https://adventofcode.com/2021/day/2

[cgoodman3]

I was awake, a little after 5am but still at a time zone disadvantage!

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Lost a couple of mins on the second part by copying my multi-row formula but forgetting to update part of the IF statement, and couldn't work out why I got the wrong answer so had to load in the example to check my logic when I discovered the typo in my IF.

[NicoleJohnson]

WELL. This one was, in the end, deceptively simple. Extremely grateful for @estherb47 who helped me re-read the instructions again. *face palm*

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What got me on this one was not understanding that in the Part 2 instructions, they basically started new - I mistakenly assumed that the rules from Part 1 still applied as far as what happens when you got an up or down instruction. Some ambiguous wording got me confused for a bit, but as soon as that mistaken assumption was cleared up, it was an easy fix/straightforward data prep solution. Look at all those pretty blue tools...

Cheers!

NJ 

[cgoodman3]

Yes I managed to beat @NicoleJohnson at posting! But I think you got the solution for the second star just before me!

Tip: If you want tool golf points then you don't need the first formula tool to set the positions at 0, as the multi-row formula has the option to set rows that don't exist to zero, so for the first commands they will all be based from 0,0

[NicoleJohnson]

Ahhh yes @cgoodman3 , but much like when I play actual golf, why hit the ball once when you can hit it three or four times instead? 🤣

Excellent tip. You get the green jacket today, particularly with your Part 1 “tool golf” solution!!

NJ

[cgoodman3]

I think you can do part 1 with just 1 multi row and do the calculation at the same time as working out the movement but I didn’t have the headspace to do it this morning.

[OllieClarke]

Feeling a multi-row theme so far

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[AkimasaKajitani]

It took long time to understand the situation at Part2.

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https://github.com/AkimasaKajitani/AdventOfCode/tree/main/2021

[jdunkerley79]

Bit late getting to it today...

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Spotter part 2 was a small extension to part 1

[AmandaH]

Another easy day, but oddly satisfying. Anyone else feel the need to name their submarine?

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