The twenty years of waiting "paid off".
Yes. Indeed it has. Check out this Raku code of mine which is a solution for this years day 14. Any experienced programmer should be able to make sense of, and mostly understand it after spending 2 hours with the docs. I doubt the same is true for any perl implementation of similar brevity.
my ( \o, \r ) =
.head.comb.List,
.tail.comb( /\w/ ).map( -> $a, $b, $c { "$a$b" => [ "$a$c", "$c$b"
+ ] } ).Hash
with cache $*IN.slurp.split: "\n\n";
sub day14( \n )
{
my %d = o.rotor( 2 => -1 )».join.Bag;
%d = [(+)] %d.map({ r.{.key} »=>» .value }) for ^n;
.Bag.values.minmax.elems - 1
with ( o.tail => 1, |%d ).map: {
.key.comb[0] => .value
};
}
say day14 10|40;
holli
You can lead your users to water, but alas, you cannot drown them.
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