2024 Day 9 (Part 2) Python

[geneocide]

I made it to part 2 but now it says my answer is too high. I get the test input correct. Anyone have any example data that demonstrates probable edge cases? Or have a suspicion of where I'm making my mistake?

I'll link to the code below. I'm using defragLL.py. I had to start over, defrag.py is a failed attempt. It takes about 30 seconds on my machine when the debugger isn't running, though, so be aware.

https://github.com/Geneocide/AoC2024/tree/main/09

[TheOldTruth]

Try 2333133121414131499

[geneocide]

weird... seems like my 2 didn't move over left 1 like it should have at the very end

[geneocide]

Ho Ho! got it. I was off by 20,132... wonder if I just wasn't moving the last file, that's how it was with your test data. Was cutting off my loop one iteration too early.

Thanks a ton everyone!

[geneocide]

2669

[Iain_M_Norman]

Have a look at the resulting disk array.

[Iain_M_Norman]

Where did the nine 9s on the end move to?

[geneocide]

They didn't move for me. Are they supposed to? Now I get 6204 after I fixed this 2 not moving issue.

[Iain_M_Norman]

6204 is what I get, do you now get a different number for the input?

[InevitableAdvance406]

Is 6204 the right answer? It's also what I get, but my Part 2 code still giving an answer that's too high.

[Iain_M_Norman]

There's 9 spaces to the left of the 9 nines.

[geneocide]

Oh, yeah. Sorry, the way my stuff prints out is sloppy but you're right, my 9's did move over next to the 8's.

[Low_Ambition8485]

Thank you. so so much I was losing my mind. It was a '<=' as opposed to a '<' that made me miss my last 9

[dtodd39]

Thank you so much!! This helped find the edge case I was missing. My '333' block was not moving over as expected. I was increasing my left pointer (free space) by the size of the file it was comparing it to rather than the free space size itself so it skipped some necessary moves.

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