X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=2023%2F17.pl;h=7a9c2ae7dcb8e63472754b7737c9834b2242b418;hb=f3326302a20e10ea19f0b085d6f606074118b05b;hp=ab77a834b3609b89f9713f17063767d56621060e;hpb=4eaa410b226684b5ff5430fc4cef481f7083a36b;p=aoc.git

diff --git a/2023/17.pl b/2023/17.pl
index ab77a83..7a9c2ae 100755
--- a/2023/17.pl
+++ b/2023/17.pl
@@ -1,19 +1,14 @@
 #!/usr/bin/perl -w
 
 use v5.38;
-use List::Util qw(sum);
 
 my $sum;
 while (<>) {
 	my @seq = /-?\d+/g;
-	my @rest;
 	while (grep $_, @seq) {
-		for my $i (0 .. $#seq-1) {
-			$seq[$i] = $seq[$i+1]-$seq[$i];
-		}
-		push @rest, pop @seq;
+		$seq[$_] = $seq[$_+1]-$seq[$_] for 0 .. $#seq-1;
+		$sum += pop @seq;
 	}
-	$sum += sum @rest;
 }
 
 say $sum;