DAJ 243

2 files changed, 55 insertions, 0 deletions

diff --git a/challenge-243/dave-jacoby/perl/ch-1.pl b/challenge-243/dave-jacoby/perl/ch-1.pl
new file mode 100644
index 0000000000..a54edcdb8d
--- /dev/null
+++ b/challenge-243/dave-jacoby/perl/ch-1.pl
@@ -0,0 +1,33 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental qw{ say postderef signatures state };
+
+use List::Compare;
+
+my @examples = (
+
+    [ 1, 3, 2, 3, 1 ],
+    [ 2, 4, 3, 5, 1 ],
+);
+for my $e (@examples) {
+    my $output = reverse_pairs( $e->@* );
+    my $input  = join ', ', $e->@*;
+    say <<~"END";
+    Input:  \@input = ($input)
+    Output: $output
+    END
+}
+
+sub reverse_pairs (@input) {
+    my $output = 0;
+    for my $i ( 0 .. -1 + scalar @input ) {
+        my $ii = $input[$i];
+        for my $j ( $i + 1 .. -1 + scalar @input ) {
+            my $jj = $input[$j];
+            $output++ if $ii > $jj * 2;
+        }
+    }
+    return $output;
+}
diff --git a/challenge-243/dave-jacoby/perl/ch-2.pl b/challenge-243/dave-jacoby/perl/ch-2.pl
new file mode 100644
index 0000000000..75e04ed38e
--- /dev/null
+++ b/challenge-243/dave-jacoby/perl/ch-2.pl
@@ -0,0 +1,22 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental qw{ say postderef signatures state };
+
+my @examples = (
+
+    [ 2, 5, 9 ],
+    [ 7, 7, 7, 7, 7, 7, 7 ],
+);
+
+for my $e (@examples) {
+    my $input  = join ', ', $e->@*;
+    my $output = floor_sum( $e->@* );
+
+    say <<~"END";
+    Input:  \$input = ($input)
+    Output:          $output
+    END
+}
+sub floor_sum (@input) {    my $output = 0;    for my $i ( 0 .. -1 + scalar @input ) {        my $ii = $input[$i];        for my $j ( 0 .. -1 + scalar @input ) {            my $jj    = $input[$j];            my $floor = int( $ii / $jj );            $output += $floor;        }    }    return $output;}
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