5 files changed, 64 insertions, 0 deletions
diff --git a/challenge-248/deadmarshal/blog.txt b/challenge-248/deadmarshal/blog.txt
new file mode 100644
index 0000000000..a553152768
--- /dev/null
+++ b/challenge-248/deadmarshal/blog.txt
@@ -0,0 +1 @@
+https://deadmarshal.blogspot.com/2023/12/twc248.html
diff --git a/challenge-248/deadmarshal/perl/ch-1.pl b/challenge-248/deadmarshal/perl/ch-1.pl
new file mode 100644
index 0000000000..2844d9fcd6
--- /dev/null
+++ b/challenge-248/deadmarshal/perl/ch-1.pl
@@ -0,0 +1,14 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use List::MoreUtils qw(indexes);
+use List::Util qw(min);
+
+sub shortest_distance{
+  my @arr = split'',$_[0];
+  map{my $i = $_; min map{abs $i - $_}indexes{$_ eq $_[1]}@arr}0..$#arr;
+}
+
+printf "(%s)\n",join ',',shortest_distance('loveleetcode','e');
+printf "(%s)\n",join ',',shortest_distance('aaab','b');
+
diff --git a/challenge-248/deadmarshal/perl/ch-2.pl b/challenge-248/deadmarshal/perl/ch-2.pl
new file mode 100644
index 0000000000..c6af446383
--- /dev/null
+++ b/challenge-248/deadmarshal/perl/ch-2.pl
@@ -0,0 +1,21 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Data::Show;
+
+sub submatrix_sum{
+  my ($m) = @_;
+  my @ret;
+  foreach my $i(0..$#$m-1){
+    push @ret,[];
+    foreach my $j(0..$#{$m->[0]}-1){
+      $ret[$i][$j] = $m->[$i][$j] + $m->[$i][$j+1] +
+	$m->[$i+1][$j] + $m->[$i+1][$j+1]
+    }
+  }
+  @ret
+}
+
+print show submatrix_sum([[1,2,3,4],[5,6,7,8],[9,10,11,12]]);
+print show submatrix_sum([[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]]);
+
diff --git a/challenge-248/deadmarshal/raku/ch-1.raku b/challenge-248/deadmarshal/raku/ch-1.raku
new file mode 100644
index 0000000000..86eec1e961
--- /dev/null
+++ b/challenge-248/deadmarshal/raku/ch-1.raku
@@ -0,0 +1,11 @@
+#!/usr/bin/env raku
+
+sub shortest-distance($str,$c)
+{
+  my @arr = $str.comb;
+  (0..@arr.end).map: {my $i = $_; ($str.indices($c).map: {abs $i - $_}).min}
+}
+
+say shortest-distance('loveleetcode','e');
+say shortest-distance('aaab','b');
+
diff --git a/challenge-248/deadmarshal/raku/ch-2.raku b/challenge-248/deadmarshal/raku/ch-2.raku
new file mode 100644
index 0000000000..faced1fe47
--- /dev/null
+++ b/challenge-248/deadmarshal/raku/ch-2.raku
@@ -0,0 +1,17 @@
+#!/usr/bin/env raku
+
+sub submatrix-sum(@m)
+{
+  my @ret;
+  for 0..@m.elems-2 -> $i {
+    for 0..@m[0].elems-2 -> $j {
+      @ret[$i;$j] = @m[$i;$j] + @m[$i;$j+1] +
+		     @m[$i+1;$j] + @m[$i+1;$j+1];
+    }
+  }
+  @ret
+}
+
+say submatrix-sum([[1,2,3,4],[5,6,7,8],[9,10,11,12]]);
+say submatrix-sum([[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]]);
+