- Added solutions to week 19 by Paulo Custodio.

- Added solutions by Kang-min Liu.

14 files changed, 2163 insertions, 2125 deletions

diff --git a/stats/pwc-challenge-019.json b/stats/pwc-challenge-019.json
index ec50b46fc0..e2e07701a4 100644
--- a/stats/pwc-challenge-019.json
+++ b/stats/pwc-challenge-019.json
@@ -1,29 +1,200 @@
 {
-   "subtitle" : {
-      "text" : "[Champions: 34] Last updated at 2020-11-29 18:53:27 GMT"
-   },
-   "chart" : {
-      "type" : "column"
-   },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
+   "xAxis" : {
+      "type" : "category"
+   },
    "legend" : {
       "enabled" : 0
    },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
+   "series" : [
+      {
+         "colorByPoint" : 1,
+         "name" : "Perl Weekly Challenge - 019",
+         "data" : [
+            {
+               "y" : 3,
+               "name" : "Adam Russell",
+               "drilldown" : "Adam Russell"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Andrezgz",
+               "name" : "Andrezgz"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Arne Sommer",
+               "name" : "Arne Sommer"
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Athanasius",
+               "name" : "Athanasius"
+            },
+            {
+               "y" : 2,
+               "name" : "Daniel Mantovani",
+               "drilldown" : "Daniel Mantovani"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Dave Cross",
+               "name" : "Dave Cross"
+            },
+            {
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Duane Powell",
+               "name" : "Duane Powell",
+               "y" : 2
+            },
+            {
+               "name" : "Duncan C. White",
+               "drilldown" : "Duncan C. White",
+               "y" : 2
+            },
+            {
+               "name" : "E. Choroba",
+               "drilldown" : "E. Choroba",
+               "y" : 3
+            },
+            {
+               "name" : "Feng Chang",
+               "drilldown" : "Feng Chang",
+               "y" : 4
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Francis Whittle",
+               "name" : "Francis Whittle"
+            },
+            {
+               "y" : 2,
+               "name" : "Guillermo Ramos",
+               "drilldown" : "Guillermo Ramos"
+            },
+            {
+               "y" : 2,
+               "name" : "Gustavo Chaves",
+               "drilldown" : "Gustavo Chaves"
+            },
+            {
+               "y" : 2,
+               "name" : "Jaime Corchado",
+               "drilldown" : "Jaime Corchado"
+            },
+            {
+               "y" : 5,
+               "drilldown" : "Jaldhar H. Vyas",
+               "name" : "Jaldhar H. Vyas"
+            },
+            {
+               "drilldown" : "Jo Christian Oterhals",
+               "name" : "Jo Christian Oterhals",
+               "y" : 3
+            },
+            {
+               "y" : 6,
+               "drilldown" : "Joelle Maslak",
+               "name" : "Joelle Maslak"
+            },
+            {
+               "name" : "Kian-Meng Ang",
+               "drilldown" : "Kian-Meng Ang",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "Laurent Rosenfeld",
+               "y" : 7
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Lubos Kolouch",
+               "name" : "Lubos Kolouch"
+            },
+            {
+               "y" : 2,
+               "name" : "Mark Anderson",
+               "drilldown" : "Mark Anderson"
+            },
+            {
+               "name" : "Markus Holzer",
+               "drilldown" : "Markus Holzer",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Noud Aldenhoven",
+               "name" : "Noud Aldenhoven",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Ozzy",
+               "name" : "Ozzy",
+               "y" : 2
+            },
+            {
+               "y" : 2,
+               "name" : "Paulo Custodio",
+               "drilldown" : "Paulo Custodio"
+            },
+            {
+               "y" : 2,
+               "name" : "Pete Houston",
+               "drilldown" : "Pete Houston"
+            },
+            {
+               "y" : 2,
+               "name" : "Prajith P",
+               "drilldown" : "Prajith P"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Randy Lauen",
+               "name" : "Randy Lauen"
+            },
+            {
+               "y" : 5,
+               "name" : "Roger Bell_West",
+               "drilldown" : "Roger Bell_West"
+            },
+            {
+               "y" : 4,
+               "name" : "Ruben Westerberg",
+               "drilldown" : "Ruben Westerberg"
+            },
+            {
+               "drilldown" : "Simon Proctor",
+               "name" : "Simon Proctor",
+               "y" : 2
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Steven Wilson",
+               "name" : "Steven Wilson"
+            },
+            {
+               "y" : 2,
+               "name" : "Stuart Little",
+               "drilldown" : "Stuart Little"
+            },
+            {
+               "name" : "Walt Mankowski",
+               "drilldown" : "Walt Mankowski",
+               "y" : 2
+            }
+         ]
       }
-   },
-   "xAxis" : {
-      "type" : "category"
+   ],
+   "chart" : {
+      "type" : "column"
    },
    "title" : {
       "text" : "Perl Weekly Challenge - 019"
@@ -31,7 +202,6 @@
    "drilldown" : {
       "series" : [
          {
-            "id" : "Adam Russell",
             "data" : [
                [
                   "Perl",
@@ -42,21 +212,20 @@
                   1
                ]
             ],
+            "id" : "Adam Russell",
             "name" : "Adam Russell"
          },
          {
             "name" : "Andrezgz",
+            "id" : "Andrezgz",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "id" : "Andrezgz"
+            ]
          },
          {
-            "id" : "Arne Sommer",
-            "name" : "Arne Sommer",
             "data" : [
                [
                   "Raku",
@@ -66,10 +235,11 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Arne Sommer",
+            "id" : "Arne Sommer"
          },
          {
-            "name" : "Athanasius",
             "data" : [
                [
                   "Perl",
@@ -80,17 +250,18 @@
                   2
                ]
             ],
+            "name" : "Athanasius",
             "id" : "Athanasius"
          },
          {
             "name" : "Daniel Mantovani",
+            "id" : "Daniel Mantovani",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "id" : "Daniel Mantovani"
+            ]
          },
          {
             "id" : "Dave Cross",
@@ -108,6 +279,7 @@
          },
          {
             "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -117,8 +289,7 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Dave Jacoby"
+            ]
          },
          {
             "id" : "Duane Powell",
@@ -141,6 +312,8 @@
             "id" : "Duncan C. White"
          },
          {
+            "name" : "E. Choroba",
+            "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
@@ -150,13 +323,11 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "E. Choroba",
-            "id" : "E. Choroba"
+            ]
          },
          {
-            "id" : "Feng Chang",
             "name" : "Feng Chang",
+            "id" : "Feng Chang",
             "data" : [
                [
                   "Perl",
@@ -169,7 +340,6 @@
             ]
          },
          {
-            "name" : "Francis Whittle",
             "data" : [
                [
                   "Raku",
@@ -180,40 +350,42 @@
                   1
                ]
             ],
-            "id" : "Francis Whittle"
+            "id" : "Francis Whittle",
+            "name" : "Francis Whittle"
          },
          {
+            "id" : "Guillermo Ramos",
             "name" : "Guillermo Ramos",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "id" : "Guillermo Ramos"
+            ]
          },
          {
+            "id" : "Gustavo Chaves",
             "name" : "Gustavo Chaves",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "id" : "Gustavo Chaves"
+            ]
          },
          {
-            "name" : "Jaime Corchado",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
+            "name" : "Jaime Corchado",
             "id" : "Jaime Corchado"
          },
          {
             "name" : "Jaldhar H. Vyas",
+            "id" : "Jaldhar H. Vyas",
             "data" : [
                [
                   "Perl",
@@ -227,11 +399,11 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Jaldhar H. Vyas"
+            ]
          },
          {
             "name" : "Jo Christian Oterhals",
+            "id" : "Jo Christian Oterhals",
             "data" : [
                [
                   "Raku",
@@ -241,10 +413,10 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Jo Christian Oterhals"
+            ]
          },
          {
+            "id" : "Joelle Maslak",
             "name" : "Joelle Maslak",
             "data" : [
                [
@@ -255,8 +427,7 @@
                   "Raku",
                   3
                ]
-            ],
-            "id" : "Joelle Maslak"
+            ]
          },
          {
             "data" : [
@@ -273,6 +444,7 @@
             "id" : "Kian-Meng Ang"
          },
          {
+            "id" : "Laurent Rosenfeld",
             "name" : "Laurent Rosenfeld",
             "data" : [
                [
@@ -287,90 +459,101 @@
                   "Blog",
                   3
                ]
-            ],
-            "id" : "Laurent Rosenfeld"
+            ]
          },
          {
-            "id" : "Lubos Kolouch",
-            "name" : "Lubos Kolouch",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Lubos Kolouch",
+            "name" : "Lubos Kolouch"
          },
          {
-            "id" : "Mark Anderson",
-            "name" : "Mark Anderson",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Mark Anderson",
+            "name" : "Mark Anderson"
          },
          {
-            "name" : "Markus Holzer",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "id" : "Markus Holzer"
+            "id" : "Markus Holzer",
+            "name" : "Markus Holzer"
          },
          {
+            "id" : "Noud Aldenhoven",
             "name" : "Noud Aldenhoven",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ],
-            "id" : "Noud Aldenhoven"
+            ]
          },
          {
-            "id" : "Ozzy",
-            "name" : "Ozzy",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Ozzy",
+            "id" : "Ozzy"
          },
          {
-            "id" : "Pete Houston",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Pete Houston"
+            "id" : "Paulo Custodio",
+            "name" : "Paulo Custodio"
          },
          {
-            "name" : "Prajith P",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Prajith P"
+            "name" : "Pete Houston",
+            "id" : "Pete Houston"
+         },
+         {
+            "name" : "Prajith P",
+            "id" : "Prajith P",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
          },
          {
             "name" : "Randy Lauen",
+            "id" : "Randy Lauen",
             "data" : [
                [
                   "Raku",
                   3
                ]
-            ],
-            "id" : "Randy Lauen"
+            ]
          },
          {
+            "name" : "Roger Bell_West",
+            "id" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -384,9 +567,7 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Roger Bell_West",
-            "id" : "Roger Bell_West"
+            ]
          },
          {
             "id" : "Ruben Westerberg",
@@ -403,24 +584,24 @@
             ]
          },
          {
-            "id" : "Simon Proctor",
-            "name" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Simon Proctor",
+            "name" : "Simon Proctor"
          },
          {
             "id" : "Steven Wilson",
+            "name" : "Steven Wilson",
             "data" : [
                [
                   "Perl",
                   3
                ]
-            ],
-            "name" : "Steven Wilson"
+            ]
          },
          {
             "id" : "Stuart Little",
@@ -433,198 +614,32 @@
             ]
          },
          {
-            "id" : "Walt Mankowski",
-            "name" : "Walt Mankowski",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Walt Mankowski",
+            "name" : "Walt Mankowski"
          }
       ]
    },
-   "series" : [
-      {
-         "name" : "Perl Weekly Challenge - 019",
-         "data" : [
-            {
-               "drilldown" : "Adam Russell",
-               "name" : "Adam Russell",
-               "y" : 3
-            },
-            {
-               "y" : 2,
-               "name" : "Andrezgz",
-               "drilldown" : "Andrezgz"
-            },
-            {
-               "drilldown" : "Arne Sommer",
-               "name" : "Arne Sommer",
-               "y" : 3
-            },
-            {
-               "drilldown" : "Athanasius",
-               "name" : "Athanasius",
-               "y" : 4
-            },
-            {
-               "y" : 2,
-               "name" : "Daniel Mantovani",
-               "drilldown" : "Daniel Mantovani"
-            },
-            {
-               "drilldown" : "Dave Cross",
-               "name" : "Dave Cross",
-               "y" : 3
-            },
-            {
-               "y" : 3,
-               "name" : "Dave Jacoby",
-               "drilldown" : "Dave Jacoby"
-            },
-            {
-               "y" : 2,
-               "name" : "Duane Powell",
-               "drilldown" : "Duane Powell"
-            },
-            {
-               "drilldown" : "Duncan C. White",
-               "name" : "Duncan C. White",
-               "y" : 2
-            },
-            {
-               "drilldown" : "E. Choroba",
-               "name" : "E. Choroba",
-               "y" : 3
-            },
-            {
-               "drilldown" : "Feng Chang",
-               "name" : "Feng Chang",
-               "y" : 4
-            },
-            {
-               "name" : "Francis Whittle",
-               "drilldown" : "Francis Whittle",
-               "y" : 3
-            },
-            {
-               "y" : 2,
-               "name" : "Guillermo Ramos",
-               "drilldown" : "Guillermo Ramos"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Gustavo Chaves",
-               "name" : "Gustavo Chaves"
-            },
-            {
-               "name" : "Jaime Corchado",
-               "drilldown" : "Jaime Corchado",
-               "y" : 2
-            },
-            {
-               "y" : 5,
-               "drilldown" : "Jaldhar H. Vyas",
-               "name" : "Jaldhar H. Vyas"
-            },
-            {
-               "y" : 3,
-               "name" : "Jo Christian Oterhals",
-               "drilldown" : "Jo Christian Oterhals"
-            },
-            {
-               "name" : "Joelle Maslak",
-               "drilldown" : "Joelle Maslak",
-               "y" : 6
-            },
-            {
-               "drilldown" : "Kian-Meng Ang",
-               "name" : "Kian-Meng Ang",
-               "y" : 3
-            },
-            {
-               "y" : 7,
-               "drilldown" : "Laurent Rosenfeld",
-               "name" : "Laurent Rosenfeld"
-            },
-            {
-               "name" : "Lubos Kolouch",
-               "drilldown" : "Lubos Kolouch",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "name" : "Mark Anderson",
-               "drilldown" : "Mark Anderson"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Markus Holzer",
-               "name" : "Markus Holzer"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Noud Aldenhoven",
-               "name" : "Noud Aldenhoven"
-            },
-            {
-               "y" : 2,
-               "name" : "Ozzy",
-               "drilldown" : "Ozzy"
-            },
-            {
-               "name" : "Pete Houston",
-               "drilldown" : "Pete Houston",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Prajith P",
-               "name" : "Prajith P"
-            },
-            {
-               "drilldown" : "Randy Lauen",
-               "name" : "Randy Lauen",
-               "y" : 3
-            },
-            {
-               "drilldown" : "Roger Bell_West",
-               "name" : "Roger Bell_West",
-               "y" : 5
-            },
-            {
-               "y" : 4,
-               "drilldown" : "Ruben Westerberg",
-               "name" : "Ruben Westerberg"
-            },
-            {
-               "name" : "Simon Proctor",
-               "drilldown" : "Simon Proctor",
-               "y" : 2
-            },
-            {
-               "name" : "Steven Wilson",
-               "drilldown" : "Steven Wilson",
-               "y" : 3
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Stuart Little",
-               "name" : "Stuart Little"
-            },
-            {
-               "y" : 2,
-               "name" : "Walt Mankowski",
-               "drilldown" : "Walt Mankowski"
-            }
-         ],
-         "colorByPoint" : 1
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         }
       }
-   ],
+   },
    "tooltip" : {
-      "followPointer" : 1,
       "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/>"
+   },
+   "subtitle" : {
+      "text" : "[Champions: 35] Last updated at 2021-01-21 22:13:02 GMT"
    }
 }
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 5e5785a430..4137538b71 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,169 +1,48 @@
 {
-   "subtitle" : {
-      "text" : "[Champions: 18] Last updated at 2021-01-21 02:22:38 GMT"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "series" : [
-      {
-         "colorByPoint" : 1,
-         "data" : [
-            {
-               "name" : "Abigail",
-               "drilldown" : "Abigail",
-               "y" : 2
-            },
-            {
-               "name" : "Andrew Shitov",
-               "drilldown" : "Andrew Shitov",
-               "y" : 1
-            },
-            {
-               "drilldown" : "Ben Davies",
-               "y" : 2,
-               "name" : "Ben Davies"
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Dave Jacoby",
-               "name" : "Dave Jacoby"
-            },
-            {
-               "name" : "E. Choroba",
-               "drilldown" : "E. Choroba",
-               "y" : 2
-            },
-            {
-               "name" : "Flavio Poletti",
-               "y" : 4,
-               "drilldown" : "Flavio Poletti"
-            },
-            {
-               "name" : "James Smith",
-               "drilldown" : "James Smith",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Joan Mimosinnet",
-               "y" : 3,
-               "name" : "Joan Mimosinnet"
-            },
-            {
-               "drilldown" : "Luca Ferrari",
-               "y" : 4,
-               "name" : "Luca Ferrari"
-            },
-            {
-               "name" : "Mark Anderson",
-               "drilldown" : "Mark Anderson",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Paulo Custodio",
-               "name" : "Paulo Custodio"
-            },
-            {
-               "name" : "Pete Houston",
-               "drilldown" : "Pete Houston",
-               "y" : 2
-            },
-            {
-               "name" : "Philip Hood",
-               "y" : 2,
-               "drilldown" : "Philip Hood"
-            },
-            {
-               "name" : "Roger Bell_West",
-               "drilldown" : "Roger Bell_West",
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    "drilldown" : {
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          {
-            "id" : "Abigail",
-            "name" : "Abigail",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Abigail",
+            "id" : "Abigail"
          },
          {
             "id" : "Andrew Shitov",
+            "name" : "Andrew Shitov",
             "data" : [
                [
                   "Raku",
                   1
                ]
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-            "name" : "Andrew Shitov"
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             "id" : "Ben Davies",
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                [
                   "Raku",
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-            ],
-            "name" : "Ben Davies"
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+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby",
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@@ -173,23 +52,19 @@
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-            "name" : "Dave Jacoby",
-            "id" : "Dave Jacoby"
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@@ -199,21 +74,41 @@
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+            "name" : "Flavio Poletti"
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@@ -222,8 +117,8 @@
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@@ -250,24 +145,24 @@
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