1 files changed, 6 insertions, 0 deletions
diff --git a/2021/day01.pl b/2021/day01.pl
new file mode 100644
index 0000000..f4ab273
--- /dev/null
+++ b/2021/day01.pl
@@ -0,0 +1,6 @@
+my $last, $incs;
+while (<>) {
+	$incs++ if ($last && $_ > $last);
+	$last = $_;
+}
+print "$incs\n";