- Added solutions by Alexander Karelas.

14 files changed, 884 insertions, 822 deletions

diff --git a/challenge-090/alexander-karelas/perl/ch-1.pl b/challenge-090/alexander-karelas/perl/ch-1.pl
new file mode 100755
index 0000000000..3796a7fd40
--- /dev/null
+++ b/challenge-090/alexander-karelas/perl/ch-1.pl
@@ -0,0 +1,21 @@
+#!/usr/bin/env perl
+
+use v5.30;
+use warnings;
+
+use Data::Dumper;
+
+my $input = "GTAAACCCCTTTTCATTTAGACAGATCGACTCCTTATCCATTCTCAGAGATGTGTTGCTGGTCGCCG";
+
+my %numbers;
+foreach my $letter (qw/ G A T C /) {
+    $numbers{$letter} = () = $input =~ /$letter/g;
+}
+
+print Dumper(\%numbers);
+
+my $output = $input;
+
+$output =~ tr/GATC/CTAG/;
+
+say $output;
\ No newline at end of file
diff --git a/challenge-090/alexander-karelas/perl/ch-2.pl b/challenge-090/alexander-karelas/perl/ch-2.pl
new file mode 100755
index 0000000000..d2b003c2a9
--- /dev/null
+++ b/challenge-090/alexander-karelas/perl/ch-2.pl
@@ -0,0 +1,26 @@
+#!/usr/bin/env perl
+
+use v5.30;
+use warnings;
+
+my $A = $ARGV[0];
+my $B = $ARGV[1];
+
+defined $A and defined $B or die "Usage: $0 <A> <B>";
+
+my @summands;
+my $total = 0;
+
+while ($A >= 1) {
+    say "$A & $B";
+
+    if ($A % 2 == 1) {
+        push @summands, $B;
+        $total += $B;
+    }
+
+    $A = int($A / 2);
+    $B *= 2;
+}
+
+say join(" + ", @summands), " = ", $total;
\ No newline at end of file
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 7d8da66e9c..49cc509147 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,114 +1,130 @@
 {
-   "xAxis" : {
-      "type" : "category"
-   },
    "series" : [
       {
+         "name" : "Perl Weekly Challenge - 090",
+         "colorByPoint" : 1,
          "data" : [
             {
-               "drilldown" : "Andrew Shitov",
+               "name" : "Alexander Karelas",
+               "drilldown" : "Alexander Karelas",
+               "y" : 2
+            },
+            {
                "name" : "Andrew Shitov",
+               "drilldown" : "Andrew Shitov",
                "y" : 2
             },
             {
+               "y" : 2,
                "drilldown" : "Feng Chang",
-               "name" : "Feng Chang",
-               "y" : 2
+               "name" : "Feng Chang"
             },
             {
-               "drilldown" : "Flavio Poletti",
                "name" : "Flavio Poletti",
+               "drilldown" : "Flavio Poletti",
                "y" : 4
             },
             {
-               "y" : 2,
                "name" : "James Smith",
+               "y" : 2,
                "drilldown" : "James Smith"
             },
             {
-               "drilldown" : "Mark Anderson",
                "name" : "Mark Anderson",
-               "y" : 2
+               "y" : 2,
+               "drilldown" : "Mark Anderson"
             },
             {
-               "drilldown" : "Philip Hood",
                "name" : "Philip Hood",
-               "y" : 2
+               "y" : 2,
+               "drilldown" : "Philip Hood"
             },
             {
+               "y" : 4,
                "drilldown" : "Roger Bell_West",
-               "name" : "Roger Bell_West",
-               "y" : 4
+               "name" : "Roger Bell_West"
             },
             {
-               "y" : 2,
                "name" : "Simon Proctor",
-               "drilldown" : "Simon Proctor"
+               "drilldown" : "Simon Proctor",
+               "y" : 2
             },
             {
-               "name" : "Stuart Little",
                "drilldown" : "Stuart Little",
-               "y" : 2
+               "y" : 2,
+               "name" : "Stuart Little"
             }
-         ],
-         "colorByPoint" : 1,
-         "name" : "Perl Weekly Challenge - 090"
+         ]
       }
    ],
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
    "chart" : {
       "type" : "column"
    },
    "title" : {
       "text" : "Perl Weekly Challenge - 090"
    },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
    "legend" : {
       "enabled" : 0
    },
+   "subtitle" : {
+      "text" : "[Champions: 10] Last updated at 2020-12-07 22:28:06 GMT"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
    "plotOptions" : {
       "series" : {
+         "borderWidth" : 0,
          "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
       }
    },
    "tooltip" : {
-      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
+      "followPointer" : 1,
       "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
-      "followPointer" : 1
-   },
-   "subtitle" : {
-      "text" : "[Champions: 9] Last updated at 2020-12-07 21:54:43 GMT"
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
    },
    "drilldown" : {
       "series" : [
          {
             "data" : [
                [
-                  "Raku",
+                  "Perl",
                   2
                ]
             ],
+            "id" : "Alexander Karelas",
+            "name" : "Alexander Karelas"
+         },
+         {
+            "name" : "Andrew Shitov",
             "id" : "Andrew Shitov",
-            "name" : "Andrew Shitov"
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
          },
          {
-            "id" : "Feng Chang",
+            "name" : "Feng Chang",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "name" : "Feng Chang"
+            "id" : "Feng Chang"
          },
          {
+            "id" : "Flavio Poletti",
             "data" : [
                [
                   "Perl",
@@ -119,40 +135,40 @@
                   2
                ]
             ],
-            "id" : "Flavio Poletti",
             "name" : "Flavio Poletti"
          },
          {
-            "name" : "James Smith",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "James Smith"
+            "id" : "James Smith",
+            "name" : "James Smith"
          },
          {
+            "name" : "Mark Anderson",
             "id" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ],
-            "name" : "Mark Anderson"
+            ]
          },
          {
-            "id" : "Philip Hood",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
+            "id" : "Philip Hood",
             "name" : "Philip Hood"
          },
          {
+            "name" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -163,27 +179,26 @@
                   2
                ]
             ],
-            "id" : "Roger Bell_West",
-            "name" : "Roger Bell_West"
+            "id" : "Roger Bell_West"
          },
          {
-            "name" : "Simon Proctor",
-            "id" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Simon Proctor",
+            "name" : "Simon Proctor"
          },
          {
-            "id" : "Stuart Little",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
+            "id" : "Stuart Little",
             "name" : "Stuart Little"
          }
       ]
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 1eb34e2785..4a4a238459 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,40 +1,25 @@
 {
+   "legend" : {
+      "enabled" : "false"
+   },
    "title" : {
       "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
    },
-   "yAxis" : {
-      "title" : {
-         "text" : null
-      },
-      "min" : 0
-   },
    "xAxis" : {
-      "type" : "category",
       "labels" : {
          "style" : {
             "fontSize" : "13px",
             "fontFamily" : "Verdana, sans-serif"
          }
-      }
+      },
+      "type" : "category"
    },
-   "chart" : {
-      "type" : "column"
+   "subtitle" : {
+      "text" : "Last updated at 2020-12-07 22:28:06 GMT"
    },
    "series" : [
       {
          "name" : "Contributions",
-         "dataLabels" : {
-            "enabled" : "true",
-            "rotation" : -90,
-            "align" : "right",
-            "y" : 10,
-            "color" : "#FFFFFF",
-            "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            },
-            "format" : "{point.y:.0f}"
-         },
          "data" : [
             [
                "Blog",
@@ -42,20 +27,35 @@
             ],
             [
                "Perl",
-               4025
+               4027
             ],
             [
                "Raku",
                2661
             ]
-         ]
+         ],
+         "dataLabels" : {
+            "color" : "#FFFFFF",
+            "rotation" : -90,
+            "y" : 10,
+            "style" : {
+               "fontFamily" : "Verdana, sans-serif",
+               "fontSize" : "13px"
+            },
+            "enabled" : "true",
+            "align" : "right",
+            "format" : "{point.y:.0f}"
+         }
       }
    ],
-   "legend" : {
-      "enabled" : "false"
+   "chart" : {
+      "type" : "column"
    },
-   "subtitle" : {
-      "text" : "Last updated at 2020-12-07 21:54:43 GMT"
+   "yAxis" : {
+      "title" : {
+         "text" : null
+      },
+      "min" : 0
    },
    "tooltip" : {
       "pointFormat" : "<b>{point.y:.0f}</b>"
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 3ac6306169..8817a3f466 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,21 +1,7 @@
 {
-   "legend" : {
-      "enabled" : "false"
-   },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         },
-         "borderWidth" : 0
-      }
-   },
-   "chart" : {
-      "type" : "column"
-   },
    "series" : [
       {
+         "name" : "Perl Weekly Challenge Languages",
          "colorByPoint" : "true",
          "data" : [
             {
@@ -24,14 +10,14 @@
                "y" : 147
             },
             {
+               "name" : "#002",
                "y" : 116,
-               "drilldown" : "002",
-               "name" : "#002"
+               "drilldown" : "002"
             },
             {
-               "y" : 73,
                "name" : "#003",
-               "drilldown" : "003"
+               "drilldown" : "003",
+               "y" : 73
             },
             {
                "name" : "#004",
@@ -39,24 +25,24 @@
                "y" : 93
             },
             {
+               "name" : "#005",
                "y" : 72,
-               "drilldown" : "005",
-               "name" : "#005"
+               "drilldown" : "005"
             },
             {
+               "name" : "#006",
                "y" : 52,
-               "drilldown" : "006",
-               "name" : "#006"
+               "drilldown" : "006"
             },
             {
-               "y" : 61,
                "name" : "#007",
+               "y" : 61,
                "drilldown" : "007"
             },
             {
                "drilldown" : "008",
-               "name" : "#008",
-               "y" : 74
+               "y" : 74,
+               "name" : "#008"
             },
             {
                "y" : 72,
@@ -64,19 +50,19 @@
                "name" : "#009"
             },
             {
+               "drilldown" : "010",
                "y" : 60,
-               "name" : "#010",
-               "drilldown" : "010"
+               "name" : "#010"
             },
             {
+               "y" : 81,
                "drilldown" : "011",
-               "name" : "#011",
-               "y" : 81
+               "name" : "#011"
             },
             {
-               "name" : "#012",
+               "y" : 85,
                "drilldown" : "012",
-               "y" : 85
+               "name" : "#012"
             },
             {
                "name" : "#013",
@@ -84,43 +70,43 @@
                "y" : 80
             },
             {
-               "y" : 98,
                "name" : "#014",
-               "drilldown" : "014"
+               "drilldown" : "014",
+               "y" : 98
             },
             {
-               "y" : 95,
                "drilldown" : "015",
+               "y" : 95,
                "name" : "#015"
             },
             {
-               "y" : 66,
+               "name" : "#016",
                "drilldown" : "016",
-               "name" : "#016"
+               "y" : 66
             },
             {
-               "name" : "#017",
                "drilldown" : "017",
-               "y" : 81
+               "y" : 81,
+               "name" : "#017"
             },
             {
+               "name" : "#018",
                "y" : 78,
-               "drilldown" : "018",
-               "name" : "#018"
+               "drilldown" : "018"
             },
             {
-               "drilldown" : "019",
                "name" : "#019",
+               "drilldown" : "019",
                "y" : 99
             },
             {
+               "drilldown" : "020",
                "y" : 97,
-               "name" : "#020",
-               "drilldown" : "020"
+               "name" : "#020"
             },
             {
-               "y" : 67,
                "drilldown" : "021",
+               "y" : 67,
                "name" : "#021"
             },
             {
@@ -129,69 +115,69 @@
                "name" : "#022"
             },
             {
-               "y" : 93,
+               "name" : "#023",
                "drilldown" : "023",
-               "name" : "#023"
+               "y" : 93
             },
             {
-               "name" : "#024",
+               "y" : 70,
                "drilldown" : "024",
-               "y" : 70
+               "name" : "#024"
             },
             {
-               "y" : 55,
                "name" : "#025",
+               "y" : 55,
                "drilldown" : "025"
             },
             {
+               "y" : 70,
                "drilldown" : "026",
-               "name" : "#026",
-               "y" : 70
+               "name" : "#026"
             },
             {
-               "y" : 58,
                "drilldown" : "027",
+               "y" : 58,
                "name" : "#027"
             },
             {
-               "y" : 80,
                "name" : "#028",
+               "y" : 80,
                "drilldown" : "028"
             },
             {
-               "drilldown" : "029",
                "name" : "#029",
+               "drilldown" : "029",
                "y" : 77
             },
             {
-               "y" : 117,
                "name" : "#030",
+               "y" : 117,
                "drilldown" : "030"
             },
             {
+               "name" : "#031",
                "y" : 89,
-               "drilldown" : "031",
-               "name" : "#031"
+               "drilldown" : "031"
             },
             {
                "name" : "#032",
-               "drilldown" : "032",
-               "y" : 94
+               "y" : 94,
+               "drilldown" : "032"
             },
             {
-               "y" : 110,
                "name" : "#033",
+               "y" : 110,
                "drilldown" : "033"
             },
             {
-               "name" : "#034",
+               "y" : 62,
                "drilldown" : "034",
-               "y" : 62
+               "name" : "#034"
             },
             {
-               "drilldown" : "035",
                "name" : "#035",
-               "y" : 62
+               "y" : 62,
+               "drilldown" : "035"
             },
             {
                "y" : 66,
@@ -199,9 +185,9 @@
                "name" : "#036"
             },
             {
-               "name" : "#037",
                "drilldown" : "037",
-               "y" : 67
+               "y" : 67,
+               "name" : "#037"
             },
             {
                "name" : "#038",
@@ -209,8 +195,8 @@
                "y" : 65
             },
             {
-               "drilldown" : "039",
                "name" : "#039",
+               "drilldown" : "039",
                "y" : 60
             },
             {
@@ -220,53 +206,53 @@
             },
             {
                "name" : "#041",
-               "drilldown" : "041",
-               "y" : 76
+               "y" : 76,
+               "drilldown" : "041"
             },
             {
+               "y" : 90,
                "drilldown" : "042",
-               "name" : "#042",
-               "y" : 90
+               "name" : "#042"
             },
             {
-               "y" : 66,
                "name" : "#043",
-               "drilldown" : "043"
+               "drilldown" : "043",
+               "y" : 66
             },
             {
-               "y" : 82,
                "drilldown" : "044",
+               "y" : 82,
                "name" : "#044"
             },
             {
                "drilldown" : "045",
-               "name" : "#045",
-               "y" : 96
+               "y" : 96,
+               "name" : "#045"
             },
             {
-               "y" : 85,
                "name" : "#046",
-               "drilldown" : "046"
+               "drilldown" : "046",
+               "y" : 85
             },
             {
-               "y" : 84,
                "drilldown" : "047",
+               "y" : 84,
                "name" : "#047"
             },
             {
                "y" : 108,
-               "name" : "#048",
-               "drilldown" : "048"
+               "drilldown" : "048",
+               "name" : "#048"
             },
             {
-               "name" : "#049",
                "drilldown" : "049",
-               "y" : 85
+               "y" : 85,
+               "name" : "#049"
             },
             {
-               "drilldown" : "050",
                "name" : "#050",
-               "y" : 96
+               "y" : 96,
+               "drilldown" : "050"
             },
             {
                "name" : "#051",
@@ -274,34 +260,34 @@
                "y" : 87
             },
             {
-               "drilldown" : "052",
                "name" : "#052",
+               "drilldown" : "052",
                "y" : 89
             },
             {
-               "drilldown" : "053",
                "name" : "#053",
+               "drilldown" : "053",
                "y" : 99
             },
             {
-               "y" : 103,
                "drilldown" : "054",
+               "y" : 103,
                "name" : "#054"
             },
             {
                "y" : 88,
-               "name" : "#055",
-               "drilldown" : "055"
+               "drilldown" : "055",
+               "name" : "#055"
             },
             {
-               "y" : 95,
                "drilldown" : "056",
+               "y" : 95,
                "name" : "#056"
             },
             {
+               "name" : "#057",
                "y" : 80,
-               "drilldown" : "057",
-               "name" : "#057"
+               "drilldown" : "057"
             },
             {
                "name" : "#058",
@@ -309,49 +295,49 @@
                "y" : 69
             },
             {
+               "y" : 89,
                "drilldown" : "059",
-               "name" : "#059",
-               "y" : 89
+               "name" : "#059"
             },
             {
-               "y" : 85,
+               "name" : "#060",
                "drilldown" : "060",
-               "name" : "#060"
+               "y" : 85
             },
             {
-               "drilldown" : "061",
                "name" : "#061",
-               "y" : 81
+               "y" : 81,
+               "drilldown" : "061"
             },
             {
+               "y" : 54,
                "drilldown" : "062",
-               "name" : "#062",
-               "y" : 54
+               "name" : "#062"
             },
             {
-               "y" : 89,
                "name" : "#063",
-               "drilldown" : "063"
+               "drilldown" : "063",
+               "y" : 89
             },
             {
                "y" : 80,
-               "name" : "#064",
-               "drilldown" : "064"
+               "drilldown" : "064",
+               "name" : "#064"
             },
             {
-               "y" : 73,
                "name" : "#065",
+               "y" : 73,
                "drilldown" : "065"
             },
             {
-               "y" : 84,
                "drilldown" : "066",
+               "y" : 84,
                "name" : "#066"
             },
             {
                "y" : 90,
-               "name" : "#067",
-               "drilldown" : "067"
+               "drilldown" : "067",
+               "name" : "#067"
             },
             {
                "y" : 75,
@@ -364,14 +350,14 @@
                "y" : 83
             },
             {
-               "y" : 93,
+               "name" : "#070",
                "drilldown" : "070",
-               "name" : "#070"
+               "y" : 93
             },
             {
-               "drilldown" : "071",
                "name" : "#071",
-               "y" : 78
+               "y" : 78,
+               "drilldown" : "071"
             },
             {
                "y" : 112,
@@ -379,19 +365,19 @@
                "name" : "#072"
             },
             {
-               "drilldown" : "073",
                "name" : "#073",
-               "y" : 110
+               "y" : 110,
+               "drilldown" : "073"
             },
             {
-               "y" : 115,
                "name" : "#074",
+               "y" : 115,
                "drilldown" : "074"
             },
             {
-               "y" : 113,
                "name" : "#075",
-               "drilldown" : "075"
+               "drilldown" : "075",
+               "y" : 113
             },
             {
                "name" : "#076",
@@ -404,9 +390,9 @@
                "name" : "#077"
             },
             {
-               "y" : 125,
                "name" : "#078",
-               "drilldown" : "078"
+               "drilldown" : "078",
+               "y" : 125
             },
             {
                "name" : "#079",
@@ -414,79 +400,101 @@
                "y" : 120
             },
             {
+               "drilldown" : "080",
                "y" : 125,
-               "name" : "#080",
-               "drilldown" : "080"
+               "name" : "#080"
             },
             {
-               "y" : 112,
                "name" : "#081",
+               "y" : 112,
                "drilldown" : "081"
             },
             {
-               "y" : 112,
+               "name" : "#082",
                "drilldown" : "082",
-               "name" : "#082"
+               "y" : 112
             },
             {
-               "name" : "#083",
                "drilldown" : "083",
-               "y" : 125
+               "y" : 125,
+               "name" : "#083"
             },
             {
                "y" : 117,
-               "name" : "#084",
-               "drilldown" : "084"
+               "drilldown" : "084",
+               "name" : "#084"
             },
             {
-               "y" : 112,
                "name" : "#085",
+               "y" : 112,
                "drilldown" : "085"
             },
             {
+               "name" : "#086",
                "y" : 102,
-               "drilldown" : "086",
-               "name" : "#086"
+               "drilldown" : "086"
             },
             {
+               "name" : "#087",
                "y" : 99,
-               "drilldown" : "087",
-               "name" : "#087"
+               "drilldown" : "087"
             },
             {
+               "name" : "#088",
                "y" : 119,
-               "drilldown" : "088",
-               "name" : "#088"
+               "drilldown" : "088"
             },
             {
-               "name" : "#089",
                "drilldown" : "089",
-               "y" : 111
+               "y" : 111,
+               "name" : "#089"
             },
             {
-               "y" : 22,
+               "y" : 24,
                "drilldown" : "090",
                "name" : "#090"
             }
-         ],
-         "name" : "Perl Weekly Challenge Languages"
+         ]
       }
    ],
-   "xAxis" : {
-      "type" : "category"
+   "chart" : {
+      "type" : "column"
    },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
+   "legend" : {
+      "enabled" : "false"
+   },
    "title" : {
       "text" : "Perl Weekly Challenge Language"
    },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "subtitle" : {
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-12-07 22:28:06 GMT"
+   },
+   "tooltip" : {
+      "headerFormat" : "<span style=\"font-size:11px\"></span>",
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
+      "followPointer" : "true"
+   },
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         },
+         "borderWidth" : 0
+      }
+   },
    "drilldown" : {
       "series" : [
          {
-            "name" : "001",
+            "id" : "001",
             "data" : [
                [
                   "Perl",
@@ -501,9 +509,11 @@
                   11
                ]
             ],
-            "id" : "001"
+            "name" : "001"
          },
          {
+            "name" : "002",
+            "id" : "002",
             "data" : [
                [
                   "Perl",
@@ -517,12 +527,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "002",
-            "name" : "002"
+            ]
          },
          {
-            "name" : "003",
             "id" : "003",
             "data" : [
                [
@@ -537,11 +544,11 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "name" : "003"
          },
          {
             "name" : "004",
-            "id" : "004",
             "data" : [
                [
                   "Perl",
@@ -555,9 +562,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "004"
          },
          {
+            "id" : "005",
             "data" : [
                [
                   "Perl",
@@ -572,10 +581,10 @@
                   12