3 files changed, 35 insertions, 0 deletions
diff --git a/challenge-339/torgny-lyon/blog.txt b/challenge-339/torgny-lyon/blog.txt
new file mode 100644
index 0000000000..9828222192
--- /dev/null
+++ b/challenge-339/torgny-lyon/blog.txt
@@ -0,0 +1 @@
+https://www.abc.se/~torgny/pwc.html#339
diff --git a/challenge-339/torgny-lyon/perl/ch-1.pl b/challenge-339/torgny-lyon/perl/ch-1.pl
new file mode 100755
index 0000000000..f63dc898fe
--- /dev/null
+++ b/challenge-339/torgny-lyon/perl/ch-1.pl
@@ -0,0 +1,16 @@
+#!/usr/bin/perl
+
+use v5.42;
+
+use Test::More tests => 5;
+
+sub find_max_diff {
+    my @ints = sort { $b <=> $a } map { abs } @_;
+    $ints[0] * $ints[1] - $ints[$#ints] * $ints[$#ints - 1];
+}
+
+is(find_max_diff(5, 9, 3, 4, 6),   42);
+is(find_max_diff(1, -2, 3, -4),    10);
+is(find_max_diff(-3, -1, -2, -4),  10);
+is(find_max_diff(10, 2, 0, 5, 1),  50);
+is(find_max_diff(7, 8, 9, 10, 10), 44);
diff --git a/challenge-339/torgny-lyon/perl/ch-2.pl b/challenge-339/torgny-lyon/perl/ch-2.pl
new file mode 100755
index 0000000000..ad724c293d
--- /dev/null
+++ b/challenge-339/torgny-lyon/perl/ch-2.pl
@@ -0,0 +1,18 @@
+#!/usr/bin/perl
+
+use v5.42;
+
+use Test::More tests => 5;
+
+use List::Util qw(max);
+
+sub find_peak_gain {
+    my $altitude;
+    max(0, map { $altitude += $_ } @_);
+}
+
+is(find_peak_gain(-5, 1, 5, -9, 2),    1);
+is(find_peak_gain(10, 10, 10, -25),    30);
+is(find_peak_gain(3, -4, 2, 5, -6, 1), 6);
+is(find_peak_gain(-1, -2, -3, -4),     0);
+is(find_peak_gain(-10, 15, 5),         10);