From eb4ebb60d76619dd7389a4e66a8a961cf807eb20 Mon Sep 17 00:00:00 2001
From: CY Fung <fungcheokyin@gmail.com>
Date: Mon, 27 Feb 2023 03:57:28 +0800
Subject: Week 205

---
 challenge-205/cheok-yin-fung/perl/ch-1.pl | 29 +++++++++++++++++++++++++++++
 challenge-205/cheok-yin-fung/perl/ch-2.pl | 21 +++++++++++++++++++++
 2 files changed, 50 insertions(+)
 create mode 100644 challenge-205/cheok-yin-fung/perl/ch-1.pl
 create mode 100644 challenge-205/cheok-yin-fung/perl/ch-2.pl

diff --git a/challenge-205/cheok-yin-fung/perl/ch-1.pl b/challenge-205/cheok-yin-fung/perl/ch-1.pl
new file mode 100644
index 0000000000..5fb7319342
--- /dev/null
+++ b/challenge-205/cheok-yin-fung/perl/ch-1.pl
@@ -0,0 +1,29 @@
+# The Weekly Challenge 205
+# Task 1 Third Highest
+use v5.30.0;
+use warnings;
+use List::Util qw/max uniq/;
+
+sub th {
+    my @arr = @_;
+    @arr = uniq @arr;
+    my $max = $arr[0];
+    my $scmax = $arr[1];
+    return $max if !defined($scmax);
+    my $thmax = $arr[2];
+    ($max, $scmax) = ($scmax, $max) if $scmax > $max;
+    return $max if !defined($thmax);
+    for my $i (2..$#arr) {
+        $thmax = $arr[$i] if $arr[$i] > $thmax;
+        ($thmax, $scmax) = ($scmax, $thmax) if $thmax > $scmax;
+        ($max, $scmax) = ($scmax, $max) if $scmax > $max;
+    }
+    return $thmax;
+}
+
+use Test::More tests=>5;
+ok th(5,3,4) == 3;
+ok th(5,6) == 6;
+ok th(5,4,4,3) == 3;
+ok th(1,1,1,1) == 1;
+ok th(1,2,3,4) == 2;
diff --git a/challenge-205/cheok-yin-fung/perl/ch-2.pl b/challenge-205/cheok-yin-fung/perl/ch-2.pl
new file mode 100644
index 0000000000..1f6802ae84
--- /dev/null
+++ b/challenge-205/cheok-yin-fung/perl/ch-2.pl
@@ -0,0 +1,21 @@
+# The Weekly Challenge 205
+# Task 2 Maximum XOR
+use v5.30.0;
+use warnings;
+use List::Util qw/max/;
+
+sub mx {
+    my @arr = @_;
+    my @xor;
+    for my $i (0..$#arr) {
+        for my $j ($i+1..$#arr) {
+            push @xor, $arr[$i] ^ $arr[$j]
+        }
+    }
+    return max @xor;
+}
+
+use Test::More tests=>3;
+ok mx(1,2,3,4,5,6,7) == 7;
+ok mx(2,4,1,3) == 7;
+ok mx(10,5,7,12,8) == 15;
-- 
cgit