From 85f44e291bf5c2f1676e5e0e041a60e1aa963411 Mon Sep 17 00:00:00 2001
From: CY Fung <fungcheokyin@gmail.com>
Date: Mon, 17 Apr 2023 07:45:44 +0800
Subject: Week 212 Task 2

---
 challenge-212/cheok-yin-fung/perl/ch-2.pl | 49 +++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 challenge-212/cheok-yin-fung/perl/ch-2.pl

diff --git a/challenge-212/cheok-yin-fung/perl/ch-2.pl b/challenge-212/cheok-yin-fung/perl/ch-2.pl
new file mode 100644
index 0000000000..626d849f87
--- /dev/null
+++ b/challenge-212/cheok-yin-fung/perl/ch-2.pl
@@ -0,0 +1,49 @@
+# The Weekly Challenge 212
+# Task 2 Rearrange Groups
+use v5.30.0;
+use warnings;
+use List::Util qw/min all/;
+use List::MoreUtils qw/frequency/;
+use Data::Printer;
+
+sub rg {
+    my @list = $_[0]->@*;
+    my $size = $_[1];
+    my @result = ();
+    while (scalar @list != 0) {
+        my %freq = frequency @list;
+        my $m = min @list;
+        return -1 if !(all {defined($freq{$m+$_}) && $freq{$m+$_} >= $freq{$m}} 1..$size-1);
+        push @result, [ $m..$m+$size-1 ] for 1..$freq{$m};
+        my $first_pop = $freq{$m};
+        for my $k (0..$size-1) {
+            $freq{$m+$k} -= $first_pop;
+        }
+        @list = ();
+        for my $key (keys %freq) {
+            push @list, $key for 1..$freq{$key};
+        }
+    }
+    return @result;
+}
+
+my @r;
+say "Example 1";
+@r = rg([1,2,3,5,1,2,7,6,3], 3);
+p @r;
+say "Example 2";
+@r = rg([1,2,3], 2);
+p @r;
+say "Example 3";
+@r = rg([1,2,4,3,5,3], 3);
+p @r;
+say "Example 4";
+@r = rg([1,5,2,6,4,7], 3);
+p @r;
+say "modified Example 4";
+@r = rg([1,5,2,6,4,7], 2);
+p @r;
+say "Test";
+@r = rg([1,2,2,3,3,4], 3);
+p @r;
+
-- 
cgit