- Added solutions by Mark Anderson.

- Added solutions by Feng Chang.
- Added solutions by Luca Ferrari.
- Added solutions by E. Choroba.
- Added solutions by David Ferrone.

42 files changed, 9181 insertions, 8618 deletions

diff --git a/stats/pwc-challenge-233.json b/stats/pwc-challenge-233.json
index 0d5bb95b6d..7267779ac1 100644
--- a/stats/pwc-challenge-233.json
+++ b/stats/pwc-challenge-233.json
@@ -1,74 +1,48 @@
 {
-   "legend" : {
-      "enabled" : 0
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         },
-         "borderWidth" : 0
-      }
-   },
-   "tooltip" : {
-      "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/>",
-      "followPointer" : 1
-   },
-   "title" : {
-      "text" : "The Weekly Challenge - 233"
-   },
-   "chart" : {
-      "type" : "column"
-   },
    "series" : [
       {
+         "name" : "The Weekly Challenge - 233",
+         "colorByPoint" : 1,
          "data" : [
             {
+               "y" : 4,
                "drilldown" : "Adam Russell",
-               "name" : "Adam Russell",
-               "y" : 4
+               "name" : "Adam Russell"
             },
             {
+               "name" : "Ali Moradi",
                "y" : 5,
-               "drilldown" : "Ali Moradi",
-               "name" : "Ali Moradi"
+               "drilldown" : "Ali Moradi"
             },
             {
-               "y" : 4,
+               "name" : "Andrew Shitov",
                "drilldown" : "Andrew Shitov",
-               "name" : "Andrew Shitov"
+               "y" : 4
             },
             {
-               "drilldown" : "Arne Sommer",
+               "name" : "Arne Sommer",
                "y" : 3,
-               "name" : "Arne Sommer"
+               "drilldown" : "Arne Sommer"
             },
             {
                "drilldown" : "Athanasius",
-               "name" : "Athanasius",
-               "y" : 4
+               "y" : 4,
+               "name" : "Athanasius"
             },
             {
-               "y" : 4,
+               "name" : "Avery Adams",
                "drilldown" : "Avery Adams",
-               "name" : "Avery Adams"
+               "y" : 4
             },
             {
+               "y" : 2,
                "drilldown" : "BarrOff",
-               "name" : "BarrOff",
-               "y" : 2
+               "name" : "BarrOff"
             },
             {
-               "name" : "Bob Lied",
+               "y" : 3,
                "drilldown" : "Bob Lied",
-               "y" : 3
+               "name" : "Bob Lied"
             },
             {
                "drilldown" : "Bruce Gray",
@@ -76,19 +50,19 @@
                "name" : "Bruce Gray"
             },
             {
-               "drilldown" : "Cheok-Yin Fung",
                "y" : 2,
+               "drilldown" : "Cheok-Yin Fung",
                "name" : "Cheok-Yin Fung"
             },
             {
+               "name" : "Dave Jacoby",
                "y" : 2,
-               "drilldown" : "Dave Jacoby",
-               "name" : "Dave Jacoby"
+               "drilldown" : "Dave Jacoby"
             },
             {
-               "name" : "David Ferrone",
                "drilldown" : "David Ferrone",
-               "y" : 2
+               "y" : 2,
+               "name" : "David Ferrone"
             },
             {
                "y" : 2,
@@ -96,33 +70,38 @@
                "name" : "E. Choroba"
             },
             {
+               "drilldown" : "Feng Chang",
+               "y" : 2,
+               "name" : "Feng Chang"
+            },
+            {
                "y" : 2,
                "drilldown" : "Humberto Massa",
                "name" : "Humberto Massa"
             },
             {
                "drilldown" : "Jaldhar H. Vyas",
-               "name" : "Jaldhar H. Vyas",
-               "y" : 5
+               "y" : 5,
+               "name" : "Jaldhar H. Vyas"
             },
             {
+               "y" : 2,
                "drilldown" : "Jan Krnavek",
-               "name" : "Jan Krnavek",
-               "y" : 2
+               "name" : "Jan Krnavek"
             },
             {
+               "name" : "Jorg Sommrey",
                "drilldown" : "Jorg Sommrey",
-               "y" : 2,
-               "name" : "Jorg Sommrey"
+               "y" : 2
             },
             {
-               "drilldown" : "Kjetil Skotheim",
                "name" : "Kjetil Skotheim",
+               "drilldown" : "Kjetil Skotheim",
                "y" : 2
             },
             {
-               "drilldown" : "Laurent Rosenfeld",
                "y" : 5,
+               "drilldown" : "Laurent Rosenfeld",
                "name" : "Laurent Rosenfeld"
             },
             {
@@ -131,38 +110,38 @@
                "y" : 3
             },
             {
-               "y" : 8,
                "drilldown" : "Luca Ferrari",
+               "y" : 8,
                "name" : "Luca Ferrari"
             },
             {
-               "y" : 2,
+               "name" : "Mariano Spadaccini",
                "drilldown" : "Mariano Spadaccini",
-               "name" : "Mariano Spadaccini"
+               "y" : 2
             },
             {
-               "y" : 2,
+               "name" : "Mark Anderson",
                "drilldown" : "Mark Anderson",
-               "name" : "Mark Anderson"
+               "y" : 2
             },
             {
+               "y" : 2,
                "drilldown" : "Marton Polgar",
-               "name" : "Marton Polgar",
-               "y" : 2
+               "name" : "Marton Polgar"
             },
             {
-               "drilldown" : "Matthew Neleigh",
+               "name" : "Matthew Neleigh",
                "y" : 2,
-               "name" : "Matthew Neleigh"
+               "drilldown" : "Matthew Neleigh"
             },
             {
-               "name" : "Matthias Muth",
                "drilldown" : "Matthias Muth",
-               "y" : 3
+               "y" : 3,
+               "name" : "Matthias Muth"
             },
             {
-               "drilldown" : "mauke",
                "y" : 2,
+               "drilldown" : "mauke",
                "name" : "mauke"
             },
             {
@@ -171,39 +150,39 @@
                "name" : "Niels van Dijke"
             },
             {
+               "name" : "Packy Anderson",
                "drilldown" : "Packy Anderson",
-               "y" : 5,
-               "name" : "Packy Anderson"
+               "y" : 5
             },
             {
+               "name" : "Peter Campbell Smith",
                "drilldown" : "Peter Campbell Smith",
-               "y" : 3,
-               "name" : "Peter Campbell Smith"
+               "y" : 3
             },
             {
+               "name" : "Peter Meszaros",
                "drilldown" : "Peter Meszaros",
-               "y" : 2,
-               "name" : "Peter Meszaros"
+               "y" : 2
             },
             {
-               "name" : "Robbie Hatley",
+               "y" : 3,
                "drilldown" : "Robbie Hatley",
-               "y" : 3
+               "name" : "Robbie Hatley"
             },
             {
-               "drilldown" : "Robert DiCicco",
                "name" : "Robert DiCicco",
-               "y" : 2
+               "y" : 2,
+               "drilldown" : "Robert DiCicco"
             },
             {
-               "y" : 2,
                "drilldown" : "Robert Ransbottom",
+               "y" : 2,
                "name" : "Robert Ransbottom"
             },
             {
+               "name" : "Roger Bell_West",
                "y" : 5,
-               "drilldown" : "Roger Bell_West",
-               "name" : "Roger Bell_West"
+               "drilldown" : "Roger Bell_West"
             },
             {
                "drilldown" : "Simon Green",
@@ -211,19 +190,19 @@
                "name" : "Simon Green"
             },
             {
-               "drilldown" : "Solathian",
                "name" : "Solathian",
+               "drilldown" : "Solathian",
                "y" : 2
             },
             {
+               "name" : "Stephen G. Lynn",
                "y" : 3,
-               "drilldown" : "Stephen G. Lynn",
-               "name" : "Stephen G. Lynn"
+               "drilldown" : "Stephen G. Lynn"
             },
             {
+               "y" : 4,
                "drilldown" : "Thomas Kohler",
-               "name" : "Thomas Kohler",
-               "y" : 4
+               "name" : "Thomas Kohler"
             },
             {
                "name" : "Ulrich Rieke",
@@ -231,23 +210,44 @@
                "y" : 4
             },
             {
-               "drilldown" : "W. Luis Mochan",
                "y" : 3,
+               "drilldown" : "W. Luis Mochan",
                "name" : "W. Luis Mochan"
             },
             {
-               "drilldown" : "Wanderdoc",
+               "name" : "Wanderdoc",
                "y" : 2,
-               "name" : "Wanderdoc"
+               "drilldown" : "Wanderdoc"
             }
-         ],
-         "colorByPoint" : 1,
-         "name" : "The Weekly Challenge - 233"
+         ]
       }
    ],
+   "tooltip" : {
+      "followPointer" : 1,
+      "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/>"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         },
+         "borderWidth" : 0
+      }
+   },
    "drilldown" : {
       "series" : [
          {
+            "id" : "Adam Russell",
             "data" : [
                [
                   "Perl",
@@ -258,10 +258,10 @@
                   2
                ]
             ],
-            "name" : "Adam Russell",
-            "id" : "Adam Russell"
+            "name" : "Adam Russell"
          },
          {
+            "name" : "Ali Moradi",
             "data" : [
                [
                   "Perl",
@@ -276,12 +276,10 @@
                   1
                ]
             ],
-            "id" : "Ali Moradi",
-            "name" : "Ali Moradi"
+            "id" : "Ali Moradi"
          },
          {
             "id" : "Andrew Shitov",
-            "name" : "Andrew Shitov",
             "data" : [
                [
                   "Raku",
@@ -291,7 +289,8 @@
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "name" : "Andrew Shitov"
          },
          {
             "name" : "Arne Sommer",
@@ -309,7 +308,6 @@
          },
          {
             "id" : "Athanasius",
-            "name" : "Athanasius",
             "data" : [
                [
                   "Perl",
@@ -319,7 +317,8 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Athanasius"
          },
          {
             "name" : "Avery Adams",
@@ -337,17 +336,17 @@
          },
          {
             "name" : "BarrOff",
-            "id" : "BarrOff",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "BarrOff"
          },
          {
-            "id" : "Bob Lied",
             "name" : "Bob Lied",
+            "id" : "Bob Lied",
             "data" : [
                [
                   "Perl",
@@ -376,42 +375,42 @@
                   2
                ]
             ],
-            "name" : "Cheok-Yin Fung",
-            "id" : "Cheok-Yin Fung"
+            "id" : "Cheok-Yin Fung",
+            "name" : "Cheok-Yin Fung"
          },
          {
-            "name" : "Dave Jacoby",
-            "id" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby"
          },
          {
-            "id" : "David Ferrone",
             "name" : "David Ferrone",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "David Ferrone"
          },
          {
+            "name" : "E. Choroba",
+            "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "name" : "E. Choroba",
-            "id" : "E. Choroba"
+            ]
          },
          {
-            "id" : "Humberto Massa",
-            "name" : "Humberto Massa",
+            "name" : "Feng Chang",
+            "id" : "Feng Chang",
             "data" : [
                [
                   "Raku",
@@ -422,6 +421,18 @@
          {
             "data" : [
                [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Humberto Massa",
+            "name" : "Humberto Massa"
+         },
+         {
+            "name" : "Jaldhar H. Vyas",
+            "id" : "Jaldhar H. Vyas",
+            "data" : [
+               [
                   "Perl",
                   2
                ],
@@ -433,41 +444,41 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Jaldhar H. Vyas",
-            "name" : "Jaldhar H. Vyas"
+            ]
          },
          {
+            "id" : "Jan Krnavek",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "name" : "Jan Krnavek",
-            "id" : "Jan Krnavek"
+            "name" : "Jan Krnavek"
          },
          {
+            "name" : "Jorg Sommrey",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Jorg Sommrey",
             "id" : "Jorg Sommrey"
          },
          {
             "name" : "Kjetil Skotheim",
-            "id" : "Kjetil Skotheim",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Kjetil Skotheim"
          },
          {
+            "name" : "Laurent Rosenfeld",
+            "id" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
@@ -481,13 +492,9 @@
                   "Blog",
                   2
                ]
-            ],
-            "name" : "Laurent Rosenfeld",
-            "id" : "Laurent Rosenfeld"
+            ]
          },
          {
-            "id" : "Lubos Kolouch",
-            "name" : "Lubos Kolouch",
             "data" : [
                [
                   "Perl",
@@ -497,11 +504,13 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Lubos Kolouch",
+            "name" : "Lubos Kolouch"
          },
          {
-            "id" : "Luca Ferrari",
             "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -514,44 +523,44 @@
             ]
          },
          {
+            "id" : "Mariano Spadaccini",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Mariano Spadaccini",
-            "id" : "Mariano Spadaccini"
+            "name" : "Mariano Spadaccini"
          },
          {
             "name" : "Mark Anderson",
-            "id" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Mark Anderson"
          },
          {
-            "name" : "Marton Polgar",
             "id" : "Marton Polgar",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Marton Polgar"
          },
          {
-            "name" : "Matthew Neleigh",
-            "id" : "Matthew Neleigh",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Matthew Neleigh",
+            "name" : "Matthew Neleigh"
          },
          {
             "data" : [
@@ -568,26 +577,27 @@
             "name" : "Matthias Muth"
          },
          {
+            "id" : "mauke",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "mauke",
-            "id" : "mauke"
+            "name" : "mauke"
          },
          {
+            "name" : "Niels van Dijke",
+            "id" : "Niels van Dijke",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "id" : "Niels van Dijke",
-            "name" : "Niels van Dijke"
+            ]
          },
          {
+            "name" : "Packy Anderson",
             "data" : [
                [
                   "Perl",
@@ -602,10 +612,10 @@
                   1
                ]
             ],
-            "name" : "Packy Anderson",
             "id" : "Packy Anderson"
          },
          {
+            "name" : "Peter Campbell Smith",
             "data" : [
                [
                   "Perl",
@@ -616,20 +626,21 @@
                   1
                ]
             ],
-            "id" : "Peter Campbell Smith",
-            "name" : "Peter Campbell Smith"
+            "id" : "Peter Campbell Smith"
          },
          {
+            "name" : "Peter Meszaros",
+            "id" : "Peter Meszaros",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "name" : "Peter Meszaros",
-            "id" : "Peter Meszaros"
+            ]
          },
          {
+            "name" : "Robbie Hatley",
+            "id" : "Robbie Hatley",
             "data" : [
                [
                   "Perl",
@@ -639,12 +650,9 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Robbie Hatley",
-            "name" : "Robbie Hatley"
+            ]
          },
          {
-            "id" : "Robert DiCicco",
             "name" : "Robert DiCicco",
             "data" : [
                [
@@ -655,19 +663,21 @@
                   "Raku",
                   1
                ]
-            ]
+            ],
+            "id" : "Robert DiCicco"
          },
          {
             "id" : "Robert Ransbottom",
-            "name" : "Robert Ransbottom",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Robert Ransbottom"
          },
          {
+            "id" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -682,10 +692,10 @@
                   1
                ]
             ],
-            "id" : "Roger Bell_West",
             "name" : "Roger Bell_West"
          },
          {
+            "id" : "Simon Green",
             "data" : [
                [
                   "Perl",
@@ -696,8 +706,7 @@
                   1
                ]
             ],
-            "name" : "Simon Green",
-            "id" : "Simon Green"
+            "name" : "Simon Green"
          },
          {
             "name" : "Solathian",
@@ -710,6 +719,7 @@
             ]
          },
          {
+            "name" : "Stephen G. Lynn",
             "data" : [
                [
                   "Perl",
@@ -720,8 +730,7 @@
                   1
                ]
             ],
-            "id" : "Stephen G. Lynn",
-            "name" : "Stephen G. Lynn"
+            "id" : "Stephen G. Lynn"
          },
          {
             "name" : "Thomas Kohler",
@@ -752,8 +761,6 @@
             "name" : "Ulrich Rieke"
          },
          {
-            "id" : "W. Luis Mochan",
-            "name" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -763,24 +770,32 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "W. Luis Mochan",
+            "name" : "W. Luis Mochan"
          },
          {
             "name" : "Wanderdoc",
-            "id" : "Wanderdoc",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Wanderdoc"
          }
       ]
    },
-   "xAxis" : {
-      "type" : "category"
+   "title" : {
+      "text" : "The Weekly Challenge - 233"
    },
    "subtitle" : {
-      "text" : "[Champions: 42] Last