3 files changed, 49 insertions, 0 deletions
diff --git a/challenge-284/feng-chang/raku/ch-1.raku b/challenge-284/feng-chang/raku/ch-1.raku
new file mode 100755
index 0000000000..3a21ac9050
--- /dev/null
+++ b/challenge-284/feng-chang/raku/ch-1.raku
@@ -0,0 +1,8 @@
+#!/bin/env raku
+
+unit sub MAIN(*@ints);
+
+with @ints.Bag.grep({ .key == .value })».value.max {
+    when -Inf { put -1 }
+    default   { .put }
+}
diff --git a/challenge-284/feng-chang/raku/ch-2.raku b/challenge-284/feng-chang/raku/ch-2.raku
new file mode 100755
index 0000000000..25a4be73c5
--- /dev/null
+++ b/challenge-284/feng-chang/raku/ch-2.raku
@@ -0,0 +1,14 @@
+#!/bin/env raku
+
+unit sub MAIN(Str:D $L1, Str:D $L2);
+
+my %pos = $L2.comb(/\d+/).map({ $_ => $++ });
+
+my (@list3, @list4);
+for $L1.comb(/\d+/) -> $n {
+    %pos{$n}.defined ??
+        @list3[%pos{$n}].push($n) !!
+        @list4.push($n);
+}
+
+put (|@list3[*;*], |@list4.sort).join(',');
diff --git a/challenge-284/feng-chang/raku/test.raku b/challenge-284/feng-chang/raku/test.raku
new file mode 100755
index 0000000000..f179ae9646
--- /dev/null
+++ b/challenge-284/feng-chang/raku/test.raku
@@ -0,0 +1,27 @@
+#!/bin/env raku
+
+# The Weekly Challenge 284
+use Test;
+
+sub pwc-test(Str:D $script, Bool :$deeply? = False, *@input) {
+    my ($expect, $assertion) = @input.splice(*-2, 2);
+    my $p = run $script, |@input, :out;
+    if $deeply {
+        is-deeply $p.out.slurp(:close).chomp.words.Bag, $expect, $assertion;
+    } else {
+        is $p.out.slurp(:close).chomp, $expect, $assertion;
+    }
+}
+
+# Task 1, Lucky Integer
+pwc-test './ch-1.raku', <2 2 3 4>,     2, 'Lucky Integer: 2,2,3,4     => 2';
+pwc-test './ch-1.raku', <1 2 2 3 3 3>, 3, 'Lucky Integer: 1,2,2,3,3,3 => 3';
+pwc-test './ch-1.raku', <1 1 1 3>,    -1, 'Lucky Integer: 1,1,1,3     => -1';
+
+# Task 2, Relative Sort
+pwc-test './ch-2.raku', '2,3,9,3,1,4,6,7,2,8,5', '2,1,4,3,5,6', '2,2,1,4,3,3,5,6,7,8,9',
+    'Relative Sort: 2,3,9,3,1,4,6,7,2,8,5 2,1,4,3,5,6 => 2,2,1,4,3,3,5,6,7,8,9';
+pwc-test './ch-2.raku', '3,3,4,6,2,4,2,1,3',     '1,3,2',       '1,3,3,3,2,2,4,4,6',
+    'Relative Sort: 3,3,4,6,2,4,2,1,3     1,3,2       => 1,3,3,3,2,2,4,4,6';
+pwc-test './ch-2.raku', '3,0,5,0,2,1,4,1,1',     '1,0,3,2',     '1,1,1,0,0,3,2,4,5',
+    'Relative Sort: 3,0,5,0,2,1,4,1,1     1,0,3,2     => 1,1,1,0,0,3,2,4,5';