- Added solutions by Eric Cheung.

- Added solutions by Laurent Rosenfeld.
- Added solutions by Mark Anderson.
- Added solutions by Niels van Dijke.
- Added solutions by PokGoPun.
- Added solutions by Luca Ferrari.
- Added solutions by David Ferrone.
- Added solutions by W. Luis Mochan.

17 files changed, 3055 insertions, 2878 deletions

diff --git a/stats/pwc-challenge-252.json b/stats/pwc-challenge-252.json
new file mode 100644
index 0000000000..06efe7708a
--- /dev/null
+++ b/stats/pwc-challenge-252.json
@@ -0,0 +1,665 @@
+{
+   "subtitle" : {
+      "text" : "[Champions: 35] Last updated at 2024-01-22 18:31:03 GMT"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "series" : [
+      {
+         "name" : "The Weekly Challenge - 252",
+         "colorByPoint" : 1,
+         "data" : [
+            {
+               "drilldown" : "Adam Russell",
+               "name" : "Adam Russell",
+               "y" : 2
+            },
+            {
+               "name" : "Ali Moradi",
+               "y" : 5,
+               "drilldown" : "Ali Moradi"
+            },
+            {
+               "drilldown" : "Arne Sommer",
+               "y" : 3,
+               "name" : "Arne Sommer"
+            },
+            {
+               "y" : 4,
+               "name" : "Athanasius",
+               "drilldown" : "Athanasius"
+            },
+            {
+               "drilldown" : "BarrOff",
+               "y" : 4,
+               "name" : "BarrOff"
+            },
+            {
+               "drilldown" : "Bob Lied",
+               "name" : "Bob Lied",
+               "y" : 2
+            },
+            {
+               "y" : 2,
+               "name" : "Bruce Gray",
+               "drilldown" : "Bruce Gray"
+            },
+            {
+               "y" : 2,
+               "name" : "Cheok-Yin Fung",
+               "drilldown" : "Cheok-Yin Fung"
+            },
+            {
+               "drilldown" : "David Ferrone",
+               "name" : "David Ferrone",
+               "y" : 2
+            },
+            {
+               "y" : 2,
+               "name" : "E. Choroba",
+               "drilldown" : "E. Choroba"
+            },
+            {
+               "drilldown" : "Jaldhar H. Vyas",
+               "name" : "Jaldhar H. Vyas",
+               "y" : 5
+            },
+            {
+               "drilldown" : "Jan Krnavek",
+               "y" : 1,
+               "name" : "Jan Krnavek"
+            },
+            {
+               "name" : "Jorg Sommrey",
+               "y" : 3,
+               "drilldown" : "Jorg Sommrey"
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 6,
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "name" : "Lubos Kolouch",
+               "y" : 4,
+               "drilldown" : "Lubos Kolouch"
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari",
+               "y" : 10
+            },
+            {
+               "name" : "Mark Anderson",
+               "y" : 2,
+               "drilldown" : "Mark Anderson"
+            },
+            {
+               "name" : "Matthew Neleigh",
+               "y" : 2,
+               "drilldown" : "Matthew Neleigh"
+            },
+            {
+               "drilldown" : "Mustafa Aydin",
+               "y" : 2,
+               "name" : "Mustafa Aydin"
+            },
+            {
+               "drilldown" : "Nelo Tovar",
+               "y" : 2,
+               "name" : "Nelo Tovar"
+            },
+            {
+               "drilldown" : "Niels van Dijke",
+               "name" : "Niels van Dijke",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Packy Anderson",
+               "y" : 5,
+               "name" : "Packy Anderson"
+            },
+            {
+               "drilldown" : "Paulo Custodio",
+               "name" : "Paulo Custodio",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Peter Campbell Smith",
+               "name" : "Peter Campbell Smith",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Peter Meszaros",
+               "y" : 2,
+               "name" : "Peter Meszaros"
+            },
+            {
+               "name" : "Robbie Hatley",
+               "y" : 3,
+               "drilldown" : "Robbie Hatley"
+            },
+            {
+               "name" : "Robert Ransbottom",
+               "y" : 2,
+               "drilldown" : "Robert Ransbottom"
+            },
+            {
+               "drilldown" : "Roger Bell_West",
+               "name" : "Roger Bell_West",
+               "y" : 5
+            },
+            {
+               "y" : 2,
+               "name" : "Scott Sotka",
+               "drilldown" : "Scott Sotka"
+            },
+            {
+               "y" : 3,
+               "name" : "Simon Green",
+               "drilldown" : "Simon Green"
+            },
+            {
+               "drilldown" : "Simon Proctor",
+               "name" : "Simon Proctor",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Stephen G. Lynn",
+               "y" : 3,
+               "name" : "Stephen G. Lynn"
+            },
+            {
+               "drilldown" : "Thomas Kohler",
+               "y" : 4,
+               "name" : "Thomas Kohler"
+            },
+            {
+               "name" : "Ulrich Rieke",
+               "y" : 4,
+               "drilldown" : "Ulrich Rieke"
+            },
+            {
+               "name" : "W. Luis Mochan",
+               "y" : 3,
+               "drilldown" : "W. Luis Mochan"
+            }
+         ]
+      }
+   ],
+   "drilldown" : {
+      "series" : [
+         {
+            "name" : "Adam Russell",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Adam Russell"
+         },
+         {
+            "name" : "Ali Moradi",
+            "id" : "Ali Moradi",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Arne Sommer",
+            "name" : "Arne Sommer"
+         },
+         {
+            "name" : "Athanasius",
+            "id" : "Athanasius",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "BarrOff",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "BarrOff"
+         },
+         {
+            "id" : "Bob Lied",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Bob Lied"
+         },
+         {
+            "id" : "Bruce Gray",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "Bruce Gray"
+         },
+         {
+            "id" : "Cheok-Yin Fung",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Cheok-Yin Fung"
+         },
+         {
+            "name" : "David Ferrone",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "David Ferrone"
+         },
+         {
+            "id" : "E. Choroba",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "E. Choroba"
+         },
+         {
+            "name" : "Jaldhar H. Vyas",
+            "id" : "Jaldhar H. Vyas",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "name" : "Jan Krnavek",
+            "data" : [
+               [
+                  "Raku",
+                  1
+               ]
+            ],
+            "id" : "Jan Krnavek"
+         },
+         {
+            "name" : "Jorg Sommrey",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Jorg Sommrey"
+         },
+         {
+            "name" : "Laurent Rosenfeld",
+            "id" : "Laurent Rosenfeld",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Lubos Kolouch",
+            "name" : "Lubos Kolouch"
+         },
+         {
+            "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  8
+               ]
+            ]
+         },
+         {
+            "name" : "Mark Anderson",
+            "id" : "Mark Anderson",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "name" : "Matthew Neleigh",
+            "id" : "Matthew Neleigh",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "name" : "Mustafa Aydin",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Mustafa Aydin"
+         },
+         {
+            "id" : "Nelo Tovar",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Nelo Tovar"
+         },
+         {
+            "name" : "Niels van Dijke",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Niels van Dijke"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Packy Anderson",
+            "name" : "Packy Anderson"
+         },
+         {
+            "name" : "Paulo Custodio",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Paulo Custodio"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Peter Campbell Smith",
+            "name" : "Peter Campbell Smith"
+         },
+         {
+            "id" : "Peter Meszaros",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Peter Meszaros"
+         },
+         {
+            "name" : "Robbie Hatley",
+            "id" : "Robbie Hatley",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "id" : "Robert Ransbottom",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "Robert Ransbottom"
+         },
+         {
+            "id" : "Roger Bell_West",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Roger Bell_West"
+         },
+         {
+            "name" : "Scott Sotka",
+            "id" : "Scott Sotka",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "name" : "Simon Green",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Simon Green"
+         },
+         {
+            "name" : "Simon Proctor",
+            "id" : "Simon Proctor",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "Stephen G. Lynn",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Stephen G. Lynn"
+         },
+         {
+            "id" : "Thomas Kohler",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "name" : "Thomas Kohler"
+         },
+         {
+            "name" : "Ulrich Rieke",
+            "id" : "Ulrich Rieke",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "W. Luis Mochan",
+            "name" : "W. Luis Mochan"
+         }
+      ]
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 252"
+   },
+   "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/>"
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         },
+         "borderWidth" : 0
+      }
+   },
+   "chart" : {
+      "type" : "column"
+   }
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 2d1d9c72f6..d1e8394d15 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,202 +1,93 @@
 {
    "title" : {
-      "text" : "The Weekly Challenge - 252"
+      "text" : "The Weekly Challenge - 253"
+   },
+   "series" : [
+      {
+         "colorByPoint" : 1,
+         "data" : [
+            {
+               "y" : 2,
+               "drilldown" : "David Ferrone",
+               "name" : "David Ferrone"
+            },
+            {
+               "name" : "Laurent Rosenfeld",
+               "y" : 3,
+               "drilldown" : "Laurent Rosenfeld"
+            },
+            {
+               "y" : 11,
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari"
+            },
+            {
+               "name" : "Mark Anderson",
+               "drilldown" : "Mark Anderson",
+               "y" : 2
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Niels van Dijke",
+               "name" : "Niels van Dijke"
+            },
+            {
+               "name" : "W. Luis Mochan",
+               "y" : 3,
+               "drilldown" : "W. Luis Mochan"
+            }
+         ],
+         "name" : "The Weekly Challenge - 253"
+      }
+   ],
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "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/>"
+   },
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         },
+         "borderWidth" : 0
+      }
    },
    "drilldown" : {
       "series" : [
          {
-            "id" : "Adam Russell",
+            "id" : "David Ferrone",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Adam Russell"
+            "name" : "David Ferrone"
          },
          {
-            "id" : "Ali Moradi",
+            "id" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
                   1
-               ]
-            ],
-            "name" : "Ali Moradi"
-         },
-         {
-            "name" : "Arne Sommer",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Arne Sommer"
-         },
-         {
-            "id" : "Athanasius",
-            "name" : "Athanasius",
-            "data" : [
-               [
-                  "Perl",
-                  2
                ],
                [
                   "Raku",
-                  2
-               ]
-            ]
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "name" : "BarrOff",
-            "id" : "BarrOff"
-         },
-         {
-            "id" : "Bob Lied",
-            "name" : "Bob Lied",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ]
-         },
-         {
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "name" : "Bruce Gray",
-            "id" : "Bruce Gray"
-         },
-         {
-            "name" : "Cheok-Yin Fung",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "Cheok-Yin Fung"
-         },
-         {
-            "id" : "David Ferrone",
-            "name" : "David Ferrone",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ]
-         },
-         {
-            "id" : "E. Choroba",
-            "name" : "E. Choroba",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ]
-         },
-         {
-            "id" : "Jaldhar H. Vyas",
-            "name" : "Jaldhar H. Vyas",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
                   1
-               ]
-            ]
-         },
-         {
-            "id" : "Jan Krnavek",
-            "data" : [
-               [
-                  "Raku",
-                  1
-               ]
-            ],
-            "name" : "Jan Krnavek"
-         },
-         {
-            "id" : "Jorg Sommrey",
-            "data" : [
-               [
-                  "Perl",
-                  2
                ],
                [
                   "Blog",
                   1
                ]
             ],
-            "name" : "Jorg Sommrey"
-         },
-         {
-            "id" : "Laurent Rosenfeld",
-            "name" : "Laurent Rosenfeld",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  2
-               ]
-            ]
-         },
-         {
-            "id" : "Lubos Kolouch",
-            "name" : "Lubos Kolouch",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ]
-            ]
+            "name" : "Laurent Rosenfeld"
          },
          {
             "id" : "Luca Ferrari",
@@ -207,40 +98,20 @@
                ],
                [
                   "Blog",
-                  8
+                  9
                ]
             ],
             "name" : "Luca Ferrari"
          },
          {
-            "id" : "Mark Anderson",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "name" : "Mark Anderson"
-         },
-         {
-            "name" : "Matthew Neleigh",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "Matthew Neleigh"
-         },
-         {
-            "name" : "Mustafa Aydin",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "id" : "Mustafa Aydin"
+            "name" : "Mark Anderson",
+            "id" : "Mark Anderson"
          },
          {
             "data" : [
@@ -249,17 +120,7 @@
                   2
                ]
             ],
-            "name" : "Nelo Tovar",
-            "id" : "Nelo Tovar"
-         },
-         {
             "name" : "Niels van Dijke",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
             "id" : "Niels van Dijke"
          },
          {
@@ -269,397 +130,25 @@
                   2
                ],
                [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "name" : "Packy Anderson",
-            "id" : "Packy Anderson"
-         },
-         {
-            "name" : "Paulo Custodio",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "Paulo Custodio"
-         },
-         {
-            "id" : "Peter Campbell Smith",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
                   "Blog",
                   1
                ]
             ],
-            "name" : "Peter Campbell Smith"
-         },
-         {
-            "name" : "Peter Meszaros",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "Peter Meszaros"
-         },
-         {
-            "id" : "Robbie Hatley",
-            "name" : "Robbie Hatley",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ]
-         },
-         {
-            "name" : "Robert Ransbottom",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "id" : "Robert Ransbottom"
-         },
-         {
-            "name" : "Roger Bell_West",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Roger Bell_West"
-         },
-         {
-            "name" : "Scott Sotka",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "id" : "Scott Sotka"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-