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! Copyright (C) 2024 Julien (adyxax) Dessaux.
! See https://factorcode.org/license.txt for BSD license.
USING: combinators.short-circuit.smart grouping io io.encodings.utf8 io.files
kernel math math.order math.parser prettyprint sequences splitting ;
IN: aoc.2024.02
<PRIVATE
: load_input ( filename -- reports ) ! reports are a sequence of levels
"~/git/adyxax/aoc/2024/02-Red-Nosed_Reports/"
swap append utf8 file-lines
[ split-words [ string>number ] map ] map ;
: bounded? ( levels -- ? )
[ - abs 1 3 between? ] monotonic? ;
: any_monotonic? ( levels -- ? )
{ [ [ > ] monotonic? ]
[ [ < ] monotonic? ]
} || ;
: safe? ( levels -- ? )
{ [ any_monotonic? ] [ bounded? ] } && ;
: part1 ( filename -- n )
load_input
[ safe? ] count ;
: candidates ( report -- reports )
dup length <iota> [ over remove-nth ] map nip ;
: safish? ( report -- ? )
candidates [ safe? ] any? ;
: part2 ( filename -- n )
load_input
[ safish? ] count ;
PRIVATE>
: aoc202402 ( -- )
"input" part1 .
"input" part2 . ;
MAIN: aoc202402
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