2 files changed, 83 insertions, 0 deletions
diff --git a/challenge-308/zapwai/perl/ch-1.pl b/challenge-308/zapwai/perl/ch-1.pl
new file mode 100644
index 0000000000..7939b9d6f0
--- /dev/null
+++ b/challenge-308/zapwai/perl/ch-1.pl
@@ -0,0 +1,28 @@
+use v5.38;
+
+sub proc($s1, $s2) {
+    my @str1 = @$s1;
+    my @str2 = @$s2;
+    say "Input: \@str1 = @str1, \@str2 = @str2";
+    my $cnt = 0;
+    for my $w1 (@str1) {
+	for my $w2 (@str2) {
+	    if ($w1 eq $w2) {
+		$cnt++;
+	    }
+	}
+    }
+    say "Output: $cnt";
+}
+
+my @str1 = ("perl", "weekly", "challenge");
+my @str2 = ("raku", "weekly", "challenge");
+proc(\@str1, \@str2);
+
+@str1 = ("perl", "raku", "python");
+@str2 = ("python", "java");
+proc(\@str1, \@str2);
+
+@str1 = ("guest", "contribution");
+@str2 = ("fun", "weekly", "challenge");
+proc(\@str1, \@str2);
diff --git a/challenge-308/zapwai/perl/ch-2.pl b/challenge-308/zapwai/perl/ch-2.pl
new file mode 100644
index 0000000000..d378e68b4f
--- /dev/null
+++ b/challenge-308/zapwai/perl/ch-2.pl
@@ -0,0 +1,55 @@
+use v5.38;
+
+# Only tests values 0 through 9 (larger would require a rewrite)
+# Returns an array of refs to arrays with these values.
+sub setup($n) {
+    my @o;
+    for my $i (0 .. 10**$n - 1) {
+	my $lab = "%0$n"."d";
+	my @a = split "", sprintf($lab, $i);
+	push @o, \@a;
+    }
+    return @o;
+}
+
+sub enc($init, @enc) {
+    my @orig = ($init);
+    my @list = setup(scalar @enc);
+    push @orig, @{$list[0]};
+    my $err = 0;
+    my $lvl = 0;
+    do {
+	$err = 0;
+	my @current;
+	for my $i (0 .. $#orig - 1) {
+	    push @current, $orig[$i] ^ $orig[$i+1];
+	}
+	say "@orig -> @current";
+	for my $i (0 .. $#enc) {
+	    if ($enc[$i] != $current[$i]) {
+		$err = 1;
+		$lvl++;
+		last;
+	    }
+	}
+	unless ($err == 0) {
+	    @orig = ($init);
+	    push @orig, @{$list[$lvl]};
+	}
+    } while ($err > 0);
+    return @orig;
+}
+
+sub proc($init, @enc) {
+    say "Input: \@encoded = @enc, \$initial = $init";
+    say "Output: ", enc($init, @enc);
+}
+
+my $init = 1;
+my @enc = (1, 2, 3);
+proc($init, @enc);
+
+$init = 4;
+@enc = (6,2,7,3);
+proc($init, @enc);
+