- Added solution by Lubos Kolouch.

40 files changed, 6548 insertions, 6533 deletions

diff --git a/stats/pwc-challenge-001.json b/stats/pwc-challenge-001.json
index baca3ad92b..1143df094d 100644
--- a/stats/pwc-challenge-001.json
+++ b/stats/pwc-challenge-001.json
@@ -1,37 +1,28 @@
 {
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         }
-      }
-   },
    "series" : [
       {
-         "colorByPoint" : 1,
          "name" : "Perl Weekly Challenge - 001",
+         "colorByPoint" : 1,
          "data" : [
             {
-               "drilldown" : "Adam Russell",
+               "name" : "Adam Russell",
                "y" : 3,
-               "name" : "Adam Russell"
+               "drilldown" : "Adam Russell"
             },
             {
-               "name" : "Ailbhe Tweedie",
+               "drilldown" : "Ailbhe Tweedie",
                "y" : 1,
-               "drilldown" : "Ailbhe Tweedie"
+               "name" : "Ailbhe Tweedie"
             },
             {
+               "y" : 2,
                "name" : "Alex Daniel",
-               "drilldown" : "Alex Daniel",
-               "y" : 2
+               "drilldown" : "Alex Daniel"
             },
             {
-               "y" : 2,
                "drilldown" : "Andrezgz",
-               "name" : "Andrezgz"
+               "name" : "Andrezgz",
+               "y" : 2
             },
             {
                "name" : "Antonio Gamiz",
@@ -40,13 +31,13 @@
             },
             {
                "drilldown" : "Arne Sommer",
-               "y" : 5,
-               "name" : "Arne Sommer"
+               "name" : "Arne Sommer",
+               "y" : 5
             },
             {
+               "name" : "Arpad Toth",
                "y" : 2,
-               "drilldown" : "Arpad Toth",
-               "name" : "Arpad Toth"
+               "drilldown" : "Arpad Toth"
             },
             {
                "drilldown" : "Athanasius",
@@ -54,138 +45,138 @@
                "name" : "Athanasius"
             },
             {
-               "name" : "Bob Kleemann",
                "drilldown" : "Bob Kleemann",
+               "name" : "Bob Kleemann",
                "y" : 2
             },
             {
-               "name" : "Daniel Mantovani",
+               "drilldown" : "Daniel Mantovani",
                "y" : 1,
-               "drilldown" : "Daniel Mantovani"
+               "name" : "Daniel Mantovani"
             },
             {
+               "drilldown" : "Dave Cross",
                "name" : "Dave Cross",
-               "y" : 3,
-               "drilldown" : "Dave Cross"
+               "y" : 3
             },
             {
                "name" : "Dave Jacoby",
-               "drilldown" : "Dave Jacoby",
-               "y" : 2
+               "y" : 2,
+               "drilldown" : "Dave Jacoby"
             },
             {
+               "name" : "David Kayal",
                "y" : 2,
-               "drilldown" : "David Kayal",
-               "name" : "David Kayal"
+               "drilldown" : "David Kayal"
             },
             {
-               "y" : 2,
                "drilldown" : "Doug Schrag",
+               "y" : 2,
                "name" : "Doug Schrag"
             },
             {
-               "drilldown" : "Dr James A. Smith",
                "y" : 4,
-               "name" : "Dr James A. Smith"
+               "name" : "Dr James A. Smith",
+               "drilldown" : "Dr James A. Smith"
             },
             {
-               "y" : 2,
                "drilldown" : "Duncan C. White",
+               "y" : 2,
                "name" : "Duncan C. White"
             },
             {
                "y" : 2,
-               "drilldown" : "Eddy HS",
-               "name" : "Eddy HS"
+               "name" : "Eddy HS",
+               "drilldown" : "Eddy HS"
             },
             {
                "y" : 2,
-               "drilldown" : "Finley",
-               "name" : "Finley"
+               "name" : "Finley",
+               "drilldown" : "Finley"
             },
             {
-               "name" : "Fred Zinn",
                "drilldown" : "Fred Zinn",
-               "y" : 1
+               "y" : 1,
+               "name" : "Fred Zinn"
             },
             {
-               "y" : 2,
                "drilldown" : "Freddie B",
+               "y" : 2,
                "name" : "Freddie B"
             },
             {
-               "name" : "Gustavo Chaves",
                "y" : 1,
+               "name" : "Gustavo Chaves",
                "drilldown" : "Gustavo Chaves"
             },
             {
                "name" : "JJ Merelo",
-               "drilldown" : "JJ Merelo",
-               "y" : 2
+               "y" : 2,
+               "drilldown" : "JJ Merelo"
             },
             {
-               "name" : "Jaldhar H. Vyas",
+               "drilldown" : "Jaldhar H. Vyas",
                "y" : 4,
-               "drilldown" : "Jaldhar H. Vyas"
+               "name" : "Jaldhar H. Vyas"
             },
             {
-               "y" : 2,
                "drilldown" : "Jeff",
-               "name" : "Jeff"
+               "name" : "Jeff",
+               "y" : 2
             },
             {
-               "name" : "Jeremy Carman",
+               "drilldown" : "Jeremy Carman",
                "y" : 2,
-               "drilldown" : "Jeremy Carman"
+               "name" : "Jeremy Carman"
             },
             {
-               "name" : "Jim Bacon",
+               "drilldown" : "Jim Bacon",
                "y" : 1,
-               "drilldown" : "Jim Bacon"
+               "name" : "Jim Bacon"
             },
             {
+               "drilldown" : "Jo Christian Oterhals",
                "name" : "Jo Christian Oterhals",
-               "y" : 5,
-               "drilldown" : "Jo Christian Oterhals"
+               "y" : 5
             },
             {
-               "name" : "Joelle Maslak",
+               "drilldown" : "Joelle Maslak",
                "y" : 4,
-               "drilldown" : "Joelle Maslak"
+               "name" : "Joelle Maslak"
             },
             {
-               "name" : "John Barrett",
+               "drilldown" : "John Barrett",
                "y" : 1,
-               "drilldown" : "John Barrett"
+               "name" : "John Barrett"
             },
             {
+               "y" : 2,
                "name" : "Juan Caballero",
-               "drilldown" : "Juan Caballero",
-               "y" : 2
+               "drilldown" : "Juan Caballero"
             },
             {
-               "name" : "Khalid",
+               "drilldown" : "Khalid",
                "y" : 2,
-               "drilldown" : "Khalid"
+               "name" : "Khalid"
             },
             {
-               "name" : "Kian-Meng Ang",
                "y" : 3,
+               "name" : "Kian-Meng Ang",
                "drilldown" : "Kian-Meng Ang"
             },
             {
-               "y" : 2,
                "drilldown" : "Kivanc Yazan",
+               "y" : 2,
                "name" : "Kivanc Yazan"
             },
             {
-               "name" : "Lars Balker",
                "drilldown" : "Lars Balker",
-               "y" : 4
+               "y" : 4,
+               "name" : "Lars Balker"
             },
             {
-               "name" : "Laurent Rosenfeld",
                "y" : 4,
+               "name" : "Laurent Rosenfeld",
                "drilldown" : "Laurent Rosenfeld"
             },
             {
@@ -194,18 +185,18 @@
                "name" : "Mark Senn"
             },
             {
-               "name" : "Martin Mugeni",
                "drilldown" : "Martin Mugeni",
+               "name" : "Martin Mugeni",
                "y" : 2
             },
             {
-               "drilldown" : "Neil Bowers",
+               "name" : "Neil Bowers",
                "y" : 1,
-               "name" : "Neil Bowers"
+               "drilldown" : "Neil Bowers"
             },
             {
-               "name" : "Nick Logan",
                "y" : 4,
+               "name" : "Nick Logan",
                "drilldown" : "Nick Logan"
             },
             {
@@ -214,48 +205,48 @@
                "drilldown" : "Oleksii Tsvietnov"
             },
             {
-               "y" : 2,
                "drilldown" : "Ozzy",
+               "y" : 2,
                "name" : "Ozzy"
             },
             {
-               "y" : 2,
                "drilldown" : "Pavel Jurca",
-               "name" : "Pavel Jurca"
+               "name" : "Pavel Jurca",
+               "y" : 2
             },
             {
-               "drilldown" : "Pete Houston",
+               "name" : "Pete Houston",
                "y" : 2,
-               "name" : "Pete Houston"
+               "drilldown" : "Pete Houston"
             },
             {
+               "drilldown" : "Philippe Bruhat",
                "name" : "Philippe Bruhat",
-               "y" : 3,
-               "drilldown" : "Philippe Bruhat"
+               "y" : 3
             },
             {
-               "name" : "Prajith P",
                "y" : 1,
+               "name" : "Prajith P",
                "drilldown" : "Prajith P"
             },
             {
-               "y" : 2,
                "drilldown" : "Sean Meininger",
+               "y" : 2,
                "name" : "Sean Meininger"
             },
             {
-               "y" : 6,
                "drilldown" : "Simon Proctor",
+               "y" : 6,
                "name" : "Simon Proctor"
             },
             {
-               "drilldown" : "Simon Reinhardt",
+               "name" : "Simon Reinhardt",
                "y" : 2,
-               "name" : "Simon Reinhardt"
+               "drilldown" : "Simon Reinhardt"
             },
             {
-               "name" : "Steve Rogerson",
                "y" : 4,
+               "name" : "Steve Rogerson",
                "drilldown" : "Steve Rogerson"
             },
             {
@@ -264,54 +255,51 @@
                "drilldown" : "Steven Wilson"
             },
             {
-               "drilldown" : "Tiago Stock",
+               "name" : "Tiago Stock",
                "y" : 1,
-               "name" : "Tiago Stock"
+               "drilldown" : "Tiago Stock"
             },
             {
-               "name" : "Tore Andersson",
                "drilldown" : "Tore Andersson",
+               "name" : "Tore Andersson",
                "y" : 2
             },
             {
-               "name" : "Veesh Goldman",
+               "drilldown" : "Veesh Goldman",
                "y" : 1,
-               "drilldown" : "Veesh Goldman"
+               "name" : "Veesh Goldman"
             },
             {
+               "drilldown" : "William Gilmore",
                "name" : "William Gilmore",
-               "y" : 1,
-               "drilldown" : "William Gilmore"
+               "y" : 1
             },
             {
-               "y" : 4,
                "drilldown" : "Yet Ebreo",
+               "y" : 4,
                "name" : "Yet Ebreo"
             }
          ]
       }
    ],
-   "tooltip" : {
-      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
-      "followPointer" : 1,
-      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
-   },
-   "legend" : {
-      "enabled" : 0
-   },
-   "subtitle" : {
-      "text" : "[Champions: 55] Last updated at 2019-10-17 17:38:08 GMT"
-   },
-   "xAxis" : {
-      "type" : "category"
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         },
+         "borderWidth" : 0
+      }
    },
    "title" : {
       "text" : "Perl Weekly Challenge - 001"
    },
+   "subtitle" : {
+      "text" : "[Champions: 55] Last updated at 2019-10-20 08:34:02 GMT"
+   },
    "drilldown" : {
       "series" : [
          {
-            "id" : "Adam Russell",
             "data" : [
                [
                   "Perl 5",
@@ -322,49 +310,51 @@
                   1
                ]
             ],
-            "name" : "Adam Russell"
+            "name" : "Adam Russell",
+            "id" : "Adam Russell"
          },
          {
-            "id" : "Ailbhe Tweedie",
-            "name" : "Ailbhe Tweedie",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
-            ]
+            ],
+            "name" : "Ailbhe Tweedie",
+            "id" : "Ailbhe Tweedie"
          },
          {
+            "name" : "Alex Daniel",
             "id" : "Alex Daniel",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ],
-            "name" : "Alex Daniel"
+            ]
          },
          {
+            "id" : "Andrezgz",
             "name" : "Andrezgz",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ],
-            "id" : "Andrezgz"
+            ]
          },
          {
-            "id" : "Antonio Gamiz",
-            "name" : "Antonio Gamiz",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ]
+            ],
+            "id" : "Antonio Gamiz",
+            "name" : "Antonio Gamiz"
          },
          {
+            "name" : "Arne Sommer",
             "id" : "Arne Sommer",
             "data" : [
                [
@@ -379,22 +369,21 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Arne Sommer"
+            ]
          },
          {
             "name" : "Arpad Toth",
+            "id" : "Arpad Toth",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ],
-            "id" : "Arpad Toth"
+            ]
          },
          {
-            "id" : "Athanasius",
             "name" : "Athanasius",
+            "id" : "Athanasius",
             "data" : [
                [
                   "Perl 5",
@@ -403,27 +392,26 @@
             ]
          },
          {
-            "id" : "Bob Kleemann",
-            "name" : "Bob Kleemann",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "id" : "Bob Kleemann",
+            "name" : "Bob Kleemann"
          },
          {
+            "id" : "Daniel Mantovani",
+            "name" : "Daniel Mantovani",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
-            ],
-            "name" : "Daniel Mantovani",
-            "id" : "Daniel Mantovani"
+            ]
          },
          {
-            "name" : "Dave Cross",
             "data" : [
                [
                   "Perl 5",
@@ -434,10 +422,10 @@
                   1
                ]
             ],
-            "id" : "Dave Cross"
+            "id" : "Dave Cross",
+            "name" : "Dave Cross"
          },
          {
-            "id" : "Dave Jacoby",
             "data" : [
                [
                   "Perl 5",
@@ -448,6 +436,7 @@
                   1
                ]
             ],
+            "id" : "Dave Jacoby",
             "name" : "Dave Jacoby"
          },
          {
@@ -457,20 +446,22 @@
                   2
                ]
             ],
-            "name" : "David Kayal",
-            "id" : "David Kayal"
+            "id" : "David Kayal",
+            "name" : "David Kayal"
          },
          {
-            "id" : "Doug Schrag",
-            "name" : "Doug Schrag",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ]
+            ],
+            "name" : "Doug Schrag",
+            "id" : "Doug Schrag"
          },
          {
+            "id" : "Dr James A. Smith",
+            "name" : "Dr James A. Smith",
             "data" : [
                [
                   "Perl 5",
@@ -480,39 +471,37 @@
                   "Perl 6",
                   2
                ]
-            ],
-            "name" : "Dr James A. Smith",
-            "id" : "Dr James A. Smith"
+            ]
          },
          {
-            "name" : "Duncan C. White",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
             ],
+            "name" : "Duncan C. White",
             "id" : "Duncan C. White"
          },
          {
-            "id" : "Eddy HS",
-            "name" : "Eddy HS",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "name" : "Eddy HS",
+            "id" : "Eddy HS"
          },
          {
+            "id" : "Finley",
             "name" : "Finley",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ],
-            "id" : "Finley"
+            ]
          },
          {
             "id" : "Fred Zinn",
@@ -525,24 +514,24 @@
             ]
          },
          {
+            "name" : "Freddie B",
+            "id" : "Freddie B",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ],
-            "name" : "Freddie B",
-            "id" : "Freddie B"
+            ]
          },
          {
             "id" : "Gustavo Chaves",
+            "name" : "Gustavo Chaves",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
-            ],
-            "name" : "Gustavo Chaves"
+            ]
          },
          {
             "data" : [
@@ -555,10 +544,11 @@
                   1
                ]
             ],
-            "name" : "JJ Merelo",
-            "id" : "JJ Merelo"
+            "id" : "JJ Merelo",
+            "name" : "JJ Merelo"
          },
          {
+            "id" : "Jaldhar H. Vyas",
             "name" : "Jaldhar H. Vyas",
             "data" : [
                [
@@ -569,20 +559,21 @@
                   "Perl 6",
                   2
                ]
-            ],
-            "id" : "Jaldhar H. Vyas"
+            ]
          },
          {
             "id" : "Jeff",
+            "name" : "Jeff",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ],
-            "name" : "Jeff"
+            ]
          },
          {
+            "id" : "Jeremy Carman",
+            "name" : "Jeremy Carman",
             "data" : [
                [
                   "Perl 5",
@@ -592,19 +583,17 @@
                   "Perl 6",
                   1
                ]
-            ],
-            "name" : "Jeremy Carman",
-            "id" : "Jeremy Carman"
+            ]
          },
          {
             "name" : "Jim Bacon",
+            "id" : "Jim Bacon",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
-            ],
-            "id" : "Jim Bacon"
+            ]
          },
          {
             "data" : [
@@ -621,8 +610,8 @@
                   1
                ]
             ],
-            "name" : "Jo Christian Oterhals",
-            "id" : "Jo Christian Oterhals"
+            "id" : "Jo Christian Oterhals",
+            "name" : "Jo Christian Oterhals"
          },
          {
             "data" : [
@@ -639,37 +628,38 @@
             "id" : "Joelle Maslak"
          },
          {
-            "id" : "John Barrett",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
             ],
+            "id" : "John Barrett",
             "name" : "John Barrett"
          },
          {
             "id" : "Juan Caballero",
+            "name" : "Juan Caballero",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ],
-            "name" : "Juan Caballero"
+            ]
          },
          {
-            "id" : "Khalid",
-            "name" : "Khalid",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "id" : "Khalid",
+            "name" : "Khalid"
          },
          {
             "name" : "Kian-Meng Ang",
+            "id" : "Kian-Meng Ang",
             "data" : [
                [
                   "Perl 5",
@@ -679,22 +669,19 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Kian-Meng Ang"
+            ]
          },
          {
-            "id" : "Kivanc Yazan",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
             ],
+            "id" : "Kivanc Yazan",
             "name" : "Kivanc Yazan"
          },
          {
-            "id" : "Lars Balker",
-            "name" : "Lars Balker",
             "data" : [
                [
                   "Perl 5",
@@ -704,7 +691,9 @@
                   "Perl 6",
                   2
                ]
-            ]
+            ],
+            "name" : "Lars Balker",
+            "id" : "Lars Balker"
          },
          {
             "data" : [
@@ -721,18 +710,18 @@
                   1
                ]
             ],
-            "name" : "Laurent Rosenfeld",
-            "id" : "Laurent Rosenfeld"
+            "id" : "Laurent Rosenfeld",
+            "name" : "Laurent Rosenfeld"
          },
          {
-            "id" : "Mark Senn",
-            "name" : "Mark Senn",
             "data" : [
                [
                   "Perl 6",
                   2
                ]