Day 5: If You Give a Seed a Fertilizer


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  • bamboo@lemmy.blahaj.zone
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    11 months ago

    Then I had the idea that the lowest number in the end must lie at the beginning of a range somewhere. Either the start of a seed range in the beginning or the start of a range in one of the mappings.

    This really helped me out. I was stuck on either trying every single seed, or working backwards and trying every single location from 0 to infinity, and couldn’t wrap my head around how to filter down the list to be manageable. Your comment made it all make sense.

    In the end, was able to work backwards with the 172 lowest locations in each range to get potential seeds, and from there was able to get a short list of 89 valid seeds (including the original seed values) to then figure out which one has the shortest location.

    Thanks!