commit 79d25cb028e6d00ec75a149a4bf4dcba15f8d20e
Author: liv <mail@liv.nrw>
Date: Sun Dec 1 16:38:02 2024 +0100
day 1
diff --git a/day1/input1.txt b/day1/input1.txt
new file mode 100644
index 0000000..86c469c
--- /dev/null
+++ b/day1/input1.txt
@@ -0,0 +1,1000 @@
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diff --git a/day1/p1.pl b/day1/p1.pl
new file mode 100644
index 0000000..0f860d9
--- /dev/null
+++ b/day1/p1.pl
@@ -0,0 +1,43 @@
+use strict;
+use warnings;
+
+open(my $in, "<", "input1.txt");
+
+my @nums1;
+my @nums2;
+
+# assign numbers correctly
+while (<$in>) {
+ my $trimmed = $_;
+ $trimmed =~ s/\n//g;
+ my @parts = split(/\s{3}/, $trimmed);
+ push(@nums1, $parts[0]);
+ push(@nums2, $parts[1]);
+}
+
+my @sorted1 = sort(@nums1);
+my @sorted2 = sort(@nums2);
+my $total_length = scalar @sorted1;
+#foreach my $i (0..$total_length - 1) {
+# print "$sorted1[$i] $sorted2[$i]\n"
+#}
+
+my $result = 0;
+my $similarity = 0;
+
+foreach my $i (0..$total_length - 1) {
+ if ($sorted1[$i] > $sorted2[$i]) {
+ my $distance = $sorted1[$i] - $sorted2[$i];
+ $result = $result + $distance;
+ } elsif ($sorted1[$i] < $sorted2[$i]) {
+ my $distance = $sorted2[$i] - $sorted1[$i];
+ $result = $result + $distance;
+ }
+
+ my @filtered = grep(/$sorted1[$i]/, @sorted2);
+ my $numitems = scalar @filtered;
+ $similarity += $sorted1[$i] * $numitems;
+}
+
+print "Total distance: $result\n";
+print "Total similarity: $similarity\n";
diff --git a/day1/test.txt b/day1/test.txt
new file mode 100644
index 0000000..b8af9ad
--- /dev/null
+++ b/day1/test.txt
@@ -0,0 +1,6 @@
+3 4
+4 3
+2 5
+1 3
+3 9
+3 3