- Added Perl solution to task 1 of week 123.

14 files changed, 1112 insertions, 1058 deletions

diff --git a/challenge-123/mohammad-anwar/perl/ch-1.pl b/challenge-123/mohammad-anwar/perl/ch-1.pl
new file mode 100644
index 0000000000..6d9d71c044
--- /dev/null
+++ b/challenge-123/mohammad-anwar/perl/ch-1.pl
@@ -0,0 +1,39 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Test::More;
+use List::Util qw(min);
+
+is(ugly_number(1), 1);
+is(ugly_number(7), 8);
+is(ugly_number(10), 12);
+is(ugly_number(150), 5832);
+
+done_testing;
+
+sub ugly_number {
+    my ($n) = @_;
+
+    return $n if ($n == 1);
+
+    my $multiple_of = { 2 => 2, 3 => 3, 5 => 5 };
+    my $index_of    = { 2 => 0, 3 => 0, 5 => 0 };
+
+    my $next = 1;
+    my $ugly_numbers = [ $next ];
+    foreach my $i (1 .. $n-1) {
+        $next = min(values %$multiple_of);
+        $ugly_numbers->[$i] = $next;
+
+        foreach my $k (keys %$multiple_of) {
+            if ($next == $multiple_of->{$k}) {
+                $index_of->{$k}++;
+                $multiple_of->{$k} = $ugly_numbers->[$index_of->{$k}] * $k;
+            }
+        }
+    }
+
+    return $next;
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index d023455555..98467a0c7e 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,44 +1,31 @@
 {
-   "legend" : {
-      "enabled" : 0
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "tooltip" : {
-      "followPointer" : 1,
-      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
-      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>"
-   },
    "series" : [
       {
-         "name" : "The Weekly Challenge - 123",
-         "colorByPoint" : 1,
          "data" : [
             {
-               "drilldown" : "Abigail",
                "y" : 2,
-               "name" : "Abigail"
+               "name" : "Abigail",
+               "drilldown" : "Abigail"
             },
             {
-               "name" : "Cheok-Yin Fung",
                "y" : 2,
+               "name" : "Cheok-Yin Fung",
                "drilldown" : "Cheok-Yin Fung"
             },
             {
                "name" : "Dave Jacoby",
-               "drilldown" : "Dave Jacoby",
-               "y" : 4
+               "y" : 4,
+               "drilldown" : "Dave Jacoby"
             },
             {
+               "drilldown" : "E. Choroba",
                "name" : "E. Choroba",
-               "y" : 2,
-               "drilldown" : "E. Choroba"
+               "y" : 2
             },
             {
                "name" : "James Smith",
-               "drilldown" : "James Smith",
-               "y" : 3
+               "y" : 3,
+               "drilldown" : "James Smith"
             },
             {
                "name" : "Lucas Ransan",
@@ -46,9 +33,9 @@
                "drilldown" : "Lucas Ransan"
             },
             {
-               "drilldown" : "Mark Anderson",
+               "name" : "Mark Anderson",
                "y" : 2,
-               "name" : "Mark Anderson"
+               "drilldown" : "Mark Anderson"
             },
             {
                "name" : "Markus Holzer",
@@ -56,19 +43,24 @@
                "drilldown" : "Markus Holzer"
             },
             {
-               "name" : "Niels van Dijke",
+               "name" : "Mohammad S Anwar",
+               "y" : 1,
+               "drilldown" : "Mohammad S Anwar"
+            },
+            {
+               "drilldown" : "Niels van Dijke",
                "y" : 2,
-               "drilldown" : "Niels van Dijke"
+               "name" : "Niels van Dijke"
             },
             {
+               "name" : "Roger Bell_West",
                "y" : 5,
-               "drilldown" : "Roger Bell_West",
-               "name" : "Roger Bell_West"
+               "drilldown" : "Roger Bell_West"
             },
             {
-               "y" : 3,
                "drilldown" : "Simon Green",
-               "name" : "Simon Green"
+               "name" : "Simon Green",
+               "y" : 3
             },
             {
                "drilldown" : "Simon Proctor",
@@ -76,23 +68,31 @@
                "name" : "Simon Proctor"
             },
             {
-               "name" : "Stuart Little",
                "y" : 4,
+               "name" : "Stuart Little",
                "drilldown" : "Stuart Little"
             },
             {
-               "name" : "Ulrich Rieke",
+               "drilldown" : "Ulrich Rieke",
                "y" : 4,
-               "drilldown" : "Ulrich Rieke"
+               "name" : "Ulrich Rieke"
             },
             {
-               "name" : "W. Luis Mochan",
                "drilldown" : "W. Luis Mochan",
-               "y" : 3
+               "y" : 3,
+               "name" : "W. Luis Mochan"
             }
-         ]
+         ],
+         "name" : "The Weekly Challenge - 123",
+         "colorByPoint" : 1
       }
    ],
+   "chart" : {
+      "type" : "column"
+   },
+   "legend" : {
+      "enabled" : 0
+   },
    "drilldown" : {
       "series" : [
          {
@@ -106,8 +106,8 @@
             ]
          },
          {
-            "name" : "Cheok-Yin Fung",
             "id" : "Cheok-Yin Fung",
+            "name" : "Cheok-Yin Fung",
             "data" : [
                [
                   "Perl",
@@ -116,8 +116,6 @@
             ]
          },
          {
-            "id" : "Dave Jacoby",
-            "name" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -127,7 +125,9 @@
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "name" : "Dave Jacoby",
+            "id" : "Dave Jacoby"
          },
          {
             "data" : [
@@ -136,11 +136,10 @@
                   2
                ]
             ],
-            "id" : "E. Choroba",
-            "name" : "E. Choroba"
+            "name" : "E. Choroba",
+            "id" : "E. Choroba"
          },
          {
-            "id" : "James Smith",
             "name" : "James Smith",
             "data" : [
                [
@@ -151,16 +150,17 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "James Smith"
          },
          {
+            "id" : "Lucas Ransan",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "id" : "Lucas Ransan",
             "name" : "Lucas Ransan"
          },
          {
@@ -175,25 +175,36 @@
          },
          {
             "name" : "Markus Holzer",
-            "id" : "Markus Holzer",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Markus Holzer"
          },
          {
+            "id" : "Mohammad S Anwar",
             "data" : [
                [
                   "Perl",
-                  2
+                  1
                ]
             ],
+            "name" : "Mohammad S Anwar"
+         },
+         {
             "id" : "Niels van Dijke",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
             "name" : "Niels van Dijke"
          },
          {
+            "name" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -208,12 +219,9 @@
                   1
                ]
             ],
-            "name" : "Roger Bell_West",
             "id" : "Roger Bell_West"
          },
          {
-            "name" : "Simon Green",
-            "id" : "Simon Green",
             "data" : [
                [
                   "Perl",
@@ -223,21 +231,22 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Simon Green",
+            "id" : "Simon Green"
          },
          {
-            "name" : "Simon Proctor",
             "id" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Simon Proctor"
          },
          {
             "id" : "Stuart Little",
-            "name" : "Stuart Little",
             "data" : [
                [
                   "Perl",
@@ -247,9 +256,12 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Stuart Little"
          },
          {
+            "id" : "Ulrich Rieke",
+            "name" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
@@ -259,9 +271,7 @@
                   "Raku",
                   2
                ]
-            ],
-            "id" : "Ulrich Rieke",
-            "name" : "Ulrich Rieke"
+            ]
          },
          {
             "id" : "W. Luis Mochan",
@@ -279,27 +289,32 @@
          }
       ]
    },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
    "subtitle" : {
-      "text" : "[Champions: 15] Last updated at 2021-07-28 20:13:41 GMT"
+      "text" : "[Champions: 16] Last updated at 2021-07-28 21:33:13 GMT"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 123"
    },
    "plotOptions" : {
       "series" : {
+         "borderWidth" : 0,
          "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
       }
    },
-   "chart" : {
-      "type" : "column"
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
    },
-   "title" : {
-      "text" : "The Weekly Challenge - 123"
+   "tooltip" : {
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
+      "followPointer" : 1
+   },
+   "xAxis" : {
+      "type" : "category"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 8aa2c712a7..4b930acfde 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -2,32 +2,11 @@
    "legend" : {
       "enabled" : "false"
    },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      }
+   "chart" : {
+      "type" : "column"
    },
    "series" : [
       {
-         "dataLabels" : {
-            "style" : {
-               "fontFamily" : "Verdana, sans-serif",
-               "fontSize" : "13px"
-            },
-            "align" : "right",
-            "rotation" : -90,
-            "color" : "#FFFFFF",
-            "format" : "{point.y:.0f}",
-            "enabled" : "true",
-            "y" : 10
-         },
          "data" : [
             [
                "Blog",
@@ -35,18 +14,30 @@
             ],
             [
                "Perl",
-               5879
+               5880
             ],
             [
                "Raku",
                3670
             ]
          ],
+         "dataLabels" : {
+            "style" : {
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
+            },
+            "rotation" : -90,
+            "y" : 10,
+            "color" : "#FFFFFF",
+            "format" : "{point.y:.0f}",
+            "align" : "right",
+            "enabled" : "true"
+         },
          "name" : "Contributions"
       }
    ],
    "subtitle" : {
-      "text" : "Last updated at 2021-07-28 20:13:41 GMT"
+      "text" : "Last updated at 2021-07-28 21:33:13 GMT"
    },
    "yAxis" : {
       "min" : 0,
@@ -57,7 +48,16 @@
    "title" : {
       "text" : "The Weekly Challenge Contributions [2019 - 2021]"
    },
-   "chart" : {
-      "type" : "column"
+   "xAxis" : {
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      },
+      "type" : "category"
+   },
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 3468f24b18..3a288867a7 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,4 +1,12 @@
 {
+   "tooltip" : {
+      "followPointer" : "true",
+      "headerFormat" : "<span style=\"font-size:11px\"></span>",
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
    "plotOptions" : {
       "series" : {
          "borderWidth" : 0,
@@ -8,9 +16,6 @@
          }
       }
    },
-   "chart" : {
-      "type" : "column"
-   },
    "title" : {
       "text" : "The Weekly Challenge Language"
    },
@@ -19,14 +24,11 @@
          "text" : "Total Solutions"
       }
    },
-   "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2021-07-28 20:13:41 GMT"
-   },
    "drilldown" : {
       "series" : [
          {
-            "name" : "001",
             "id" : "001",
+            "name" : "001",
             "data" : [
                [
                   "Perl",
@@ -43,6 +45,7 @@
             ]
          },
          {
+            "name" : "002",
             "data" : [
                [
                   "Perl",
@@ -57,12 +60,10 @@
                   10
                ]
             ],
-            "name" : "002",
             "id" : "002"
          },
          {
             "name" : "003",
-            "id" : "003",
             "data" : [
                [
                   "Perl",
@@ -76,10 +77,10 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "id" : "003"
          },
          {
-            "name" : "004",
             "id" : "004",
             "data" : [
                [
@@ -94,11 +95,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "004"
          },
          {
             "id" : "005",
-            "name" : "005",
             "data" : [
                [
                   "Perl",
@@ -112,10 +113,10 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "005"
          },
          {
-            "id" : "006",
             "name" : "006",
             "data" : [
                [
@@ -130,11 +131,11 @@
                   "Blog",
                   7
                ]
-            ]
+            ],
+            "id" : "006"
          },
          {
             "id" : "007",
-            "name" : "007",
             "data" : [
                [
                   "Perl",
@@ -148,9 +149,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "007"
          },
          {
+            "name" : "008",
             "data" : [
                [
                   "Perl",
@@ -165,7 +168,6 @@
                   12
                ]
             ],
-            "name" : "008",
             "id" : "008"
          },
          {
@@ -201,10 +203,11 @@
                   11
                ]
             ],
-            "id" : "010",
-            "name" : "010"
+            "name" : "010",
+            "id" : "010"
          },
          {
+            "id" : "011",
             "data" : [
                [
                   "Perl",
@@ -219,12 +222,9 @@
                   10
                ]
             ],
-            "id" : "011",
             "name" : "011"
          },
          {
-            "name" : "012",
-            "id" : "012",
             "data" : [
                [
                   "Perl",
@@ -238,7 +238,9 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "012",
+            "id" : "012"
          },
          {
             "data" : [
@@ -259,6 +261,7 @@
             "id" : "013"
          },
          {
+            "id" : "014",
             "data" : [
                [
                   "Perl",
@@ -273,8 +276,7 @@
                   15
                ]
             ],
-            "name" : "014",
-            "id" : "014"
+            "name" : "014"
          },
          {
             "data" : [
@@ -291,8 +293,8 @@
                   15
                ]
             ],
-            "id" : "015",
-            "name" : "015"
+            "name" : "015",
+            "id" : "015"
          },
          {
             "data" : [
@@ -314,7 +316,6 @@
          },
          {
             "id" : "017",
-            "name" : "017",
             "data" : [
                [
                   "Perl",
@@ -328,11 +329,10 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "017"
          },
          {
-            "name" : "018",
-            "id" : "018",
             "data" : [
                [
                   "Perl",
@@ -346,10 +346,11 @@
                   "Blog",
                   14
                ]
-            ]
+            ],
+            "name" : "018",
+            "id" : "018"
          },
          {
-            "id" : "019",
             "name" : "019",
             "data" : [
                [
@@ -364,9 +365,11 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "id" : "019"
          },
          {
+            "name" : "020",
             "data" : [
                [
                   "Perl",
@@ -381,12 +384,9 @@
                   13
                ]
             ],
-            "name" : "020",
             "id" : "020"
          },
          {
-            "name" : "021",
-            "id" : "021",
             "data" : [
                [
                   "Perl",
@@ -400,9 +400,12 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "021",
+            "id" : "021"
          },
          {
+            "name" : "022",
             "data" : [
                [
                   "Perl",
@@ -417,10 +420,10 @@
                   10
                ]
             ],
-            "id" : "022",
-            "name" : "022"
+            "id" : "022"
          },
          {
+            "name" : "023",
             "data" : [
                [
                   "Perl",
@@ -435,10 +438,10 @@
                   12
                ]
             ],
-            "id" : "023",
-            "name" : "023"
+            "id" : "023"
          },
          {
+            "id" : "024",
             "data" : [
                [
                   "Perl",
@@ -453,11 +456,9 @@
                   11
                ]
             ],
-            "id" : "024",
             "name" : "024"
          },
          {
-            "name" : "025",
             "id" : "025",
             "data" : [
                [
@@ -472,11 +473,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "025"
          },
          {
             "id" : "026",
-            "name" : "026",
             "data" : [
                [
                   "Perl",
@@ -490,10 +491,10 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "026"
          },
          {
-            "name" : "027",
             "id" : "027",
             "data" : [
                [
@@ -508,11 +509,12 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "name" : "027"
          },
          {
-            "name" : "028",
             "id" : "028",
+            "name" : "028",
             "data" : [
                [
                   "Perl",
@@ -529,6 +531,8 @@
             ]
          },
          {
+            "id" : "029",
+            "name" : "029",
             "data" : [
                [
                   "Perl",
@@ -542,13 +546,11 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "029",
-            "name" : "029"
+            ]
          },
          {
-            "name" : "030",
             "id" : "030",
+            "name" : "030",
             "data" : [
                [
                   "Perl",
@@ -566,7 +568,6 @@
          },
          {
             "name" : "031",
-            "id" : "031",
             "data" : [
                [
                   "Perl",
@@ -580,7 +581,8 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "id" : "031"
          },
          {
             "data" : [
@@ -619,8 +621,6 @@
             "id" : "033"
          },
          {
-            "name" : "034",
-            "id" : "034",
             "data" : [
                [
                   "Perl",
@@ -634,7 +634,9 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "034",
+            "id" : "034"
          },
          {
             "data" : [
@@ -651,8 +653,8 @@
                   9
                ]
             ],
-            "id" : "035",
-            "name" : "035"
+            "name" : "035",
+            "id" : "035"
          },
          {
             "data" : [
@@ -673,8 +675,8 @@
             "id" : "036"
          },
          {
-            "name" : "037",
             "id" : "037",
+            "name" : "037",
             "data" : [
                [
                   "Perl",
@@ -691,7 +693,6 @@
             ]
          },
          {
-            "id" : "038",
             "name" : "038",
             "data" : [
                [
@@ -706,11 +707,10 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "038"
          },
          {
-            "name" : "039",
-            "id" : "039",
             "data" : [
                [
                   "Perl",
@@ -724,10 +724,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "039",
+            "id" : "039"
          },
          {
-            "id" : "040",
             "name" : "040",
             "data" : [
                [
@@ -742,9 +743,12 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "040"
          },
          {
+            "id" : "041",
+            "name" : "041",
             "data" : [
                [
                   "Perl",
@@ -758,13 +762,11 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "041",
-            "name" : "041"
+            ]
          },
          {
-            "name" : "042",
             "id" : "042",
+            "name" : "042",
             "data" : [
                [
                   "Perl",
@@ -800,7 +802,6 @@
          },
          {
             "name" : "044",
-            "id" : "044",
             "data" : [
                [
                   "Perl",
@@ -814,11 +815,12 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "id" : "044"
          },
          {
-            "name" : "045",
             "id" : "045",
+            "name" : "045",
             "data" : [
                [
                   "Perl",
@@ -835,6 +837,7 @@
             ]
          },
          {
+            "id" : "046",
             "data" : [
                [
                   "Perl",
@@ -849,10 +852,11 @@
                   10
                ]
             ],
-            "id" : "046",
             "name" : "046"
          },
          {
+            "id" : "047",
+            "name" : "047",
             "data" : [
                [
                   "Perl",
@@ -866,9 +870,7 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "047",
-            "id" : "047"
+            ]
          },
          {
             "data" : [
@@ -885,12 +887,12 @@
                   12
                ]
             ],
-            "id" : "048",
-            "name" : "048"
+            "name" : "048",
+            "id" : "048"
          },
          {
-            "name" : "049",
             "id" : "049",
+            "name" : "049",
             "data" : [
                [
                   "Perl",
@@ -921,12 +923,10 @@
                   12
                ]
             ],
-            "id" : "050",
-            "name" : "050"
+            "name" : "050",
+            "id" : "050"
          },
          {
-            "id" : "051",
-            "name" : "051",
             "data" : [
                [
                   "Perl",
@@ -940,9 +940,12 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "051",
+            "id" : "051"
          },
          {
+            "id" : "052",
             "data" : [
                [
                   "Perl",
@@ -957,8 +960,7 @@
                   14
                ]
             ],
-            "name" : "052",
-            "id" : "052"
+            "name" : "052"
          },
          {
             "id" : "053",
@@ -993,10 +995,11 @@
                   18
                ]
             ],
-            "id" : "054",
-            "name" : "054"
+            "name" : "054",
+            "id" : "054"
          },
          {
+            "name" : "055",
             "data" : [
                [
                   "Perl",
@@ -1011,12 +1014,11 @@
                   14
                ]
             ],
-            "name" : "055",
             "id" : "055"
          },
          {
-            "name" : "056",
             "id" : "056",
+            "name" : "056",
             "data" : [
                [
                   "Perl",
@@ -1033,6 +1035,8 @@
             ]
          },
          {
+            "id" : "057",
+            "name" : "057",
             "data" : [