- Added solutions by Andrew Shitov.

17 files changed, 3138 insertions, 3119 deletions

diff --git a/stats/pwc-challenge-219.json b/stats/pwc-challenge-219.json
index cb975dc218..f41f581677 100644
--- a/stats/pwc-challenge-219.json
+++ b/stats/pwc-challenge-219.json
@@ -1,10 +1,161 @@
 {
-   "xAxis" : {
-      "type" : "category"
-   },
+   "series" : [
+      {
+         "data" : [
+            {
+               "drilldown" : "Arne Sommer",
+               "y" : 3,
+               "name" : "Arne Sommer"
+            },
+            {
+               "name" : "Athanasius",
+               "y" : 2,
+               "drilldown" : "Athanasius"
+            },
+            {
+               "name" : "Avery Adams",
+               "y" : 3,
+               "drilldown" : "Avery Adams"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "BarrOff",
+               "name" : "BarrOff"
+            },
+            {
+               "name" : "Bruce Gray",
+               "y" : 2,
+               "drilldown" : "Bruce Gray"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "David Ferrone",
+               "name" : "David Ferrone"
+            },
+            {
+               "drilldown" : "E. Choroba",
+               "y" : 2,
+               "name" : "E. Choroba"
+            },
+            {
+               "y" : 6,
+               "drilldown" : "Flavio Poletti",
+               "name" : "Flavio Poletti"
+            },
+            {
+               "drilldown" : "Jaldhar H. Vyas",
+               "y" : 5,
+               "name" : "Jaldhar H. Vyas"
+            },
+            {
+               "name" : "Jan Krnavek",
+               "drilldown" : "Jan Krnavek",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Jorg Sommrey",
+               "y" : 1,
+               "name" : "Jorg Sommrey"
+            },
+            {
+               "name" : "Lance Wicks",
+               "drilldown" : "Lance Wicks",
+               "y" : 1
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 3,
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "name" : "Lubos Kolouch",
+               "y" : 2,
+               "drilldown" : "Lubos Kolouch"
+            },
+            {
+               "name" : "Luca Ferrari",
+               "y" : 8,
+               "drilldown" : "Luca Ferrari"
+            },
+            {
+               "drilldown" : "Mariano Spadaccini",
+               "y" : 1,
+               "name" : "Mariano Spadaccini"
+            },
+            {
+               "drilldown" : "Mark Anderson",
+               "y" : 1,
+               "name" : "Mark Anderson"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Matthias Muth",
+               "name" : "Matthias Muth"
+            },
+            {
+               "name" : "Peter Campbell Smith",
+               "drilldown" : "Peter Campbell Smith",
+               "y" : 3
+            },
+            {
+               "name" : "Robbie Hatley",
+               "drilldown" : "Robbie Hatley",
+               "y" : 2
+            },
+            {
+               "name" : "Robert DiCicco",
+               "drilldown" : "Robert DiCicco",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Robert Ransbottom",
+               "y" : 2,
+               "name" : "Robert Ransbottom"
+            },
+            {
+               "name" : "Roger Bell_West",
+               "y" : 5,
+               "drilldown" : "Roger Bell_West"
+            },
+            {
+               "name" : "Simon Green",
+               "y" : 3,
+               "drilldown" : "Simon Green"
+            },
+            {
+               "name" : "Solathian",
+               "y" : 1,
+               "drilldown" : "Solathian"
+            },
+            {
+               "name" : "Stephen G. Lynn",
+               "y" : 3,
+               "drilldown" : "Stephen G. Lynn"
+            },
+            {
+               "drilldown" : "Thomas Kohler",
+               "y" : 4,
+               "name" : "Thomas Kohler"
+            },
+            {
+               "drilldown" : "Ulrich Rieke",
+               "y" : 2,
+               "name" : "Ulrich Rieke"
+            },
+            {
+               "drilldown" : "W. Luis Mochan",
+               "y" : 3,
+               "name" : "W. Luis Mochan"
+            }
+         ],
+         "name" : "The Weekly Challenge - 219",
+         "colorByPoint" : 1
+      }
+   ],
    "drilldown" : {
       "series" : [
          {
+            "name" : "Arne Sommer",
             "data" : [
                [
                   "Raku",
@@ -15,10 +166,10 @@
                   1
                ]
             ],
-            "name" : "Arne Sommer",
             "id" : "Arne Sommer"
          },
          {
+            "id" : "Athanasius",
             "data" : [
                [
                   "Perl",
@@ -29,12 +180,10 @@
                   1
                ]
             ],
-            "name" : "Athanasius",
-            "id" : "Athanasius"
+            "name" : "Athanasius"
          },
          {
             "name" : "Avery Adams",
-            "id" : "Avery Adams",
             "data" : [
                [
                   "Perl",
@@ -44,11 +193,12 @@
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "id" : "Avery Adams"
          },
          {
-            "id" : "BarrOff",
             "name" : "BarrOff",
+            "id" : "BarrOff",
             "data" : [
                [
                   "Perl",
@@ -77,18 +227,18 @@
                   2
                ]
             ],
-            "name" : "David Ferrone",
-            "id" : "David Ferrone"
+            "id" : "David Ferrone",
+            "name" : "David Ferrone"
          },
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             "id" : "E. Choroba",
-            "name" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "E. Choroba"
          },
          {
             "name" : "Flavio Poletti",
@@ -109,7 +259,6 @@
             ]
          },
          {
-            "id" : "Jaldhar H. Vyas",
             "name" : "Jaldhar H. Vyas",
             "data" : [
                [
@@ -124,7 +273,8 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Jaldhar H. Vyas"
          },
          {
             "data" : [
@@ -137,28 +287,27 @@
             "name" : "Jan Krnavek"
          },
          {
-            "name" : "Jorg Sommrey",
             "id" : "Jorg Sommrey",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "name" : "Jorg Sommrey"
          },
          {
+            "name" : "Lance Wicks",
+            "id" : "Lance Wicks",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ],
-            "name" : "Lance Wicks",
-            "id" : "Lance Wicks"
+            ]
          },
          {
             "name" : "Laurent Rosenfeld",
-            "id" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
@@ -172,21 +321,21 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Laurent Rosenfeld"
          },
          {
             "name" : "Lubos Kolouch",
-            "id" : "Lubos Kolouch",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Lubos Kolouch"
          },
          {
             "id" : "Luca Ferrari",
-            "name" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -196,29 +345,32 @@
                   "Blog",
                   6
                ]
-            ]
+            ],
+            "name" : "Luca Ferrari"
          },
          {
+            "id" : "Mariano Spadaccini",
             "data" : [
                [
                   "Perl",
                   1
                ]
             ],
-            "id" : "Mariano Spadaccini",
             "name" : "Mariano Spadaccini"
          },
          {
+            "id" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
                   1
                ]
             ],
-            "name" : "Mark Anderson",
-            "id" : "Mark Anderson"
+            "name" : "Mark Anderson"
          },
          {
+            "name" : "Matthias Muth",
+            "id" : "Matthias Muth",
             "data" : [
                [
                   "Perl",
@@ -228,9 +380,7 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Matthias Muth",
-            "id" : "Matthias Muth"
+            ]
          },
          {
             "data" : [
@@ -248,7 +398,6 @@
          },
          {
             "name" : "Robbie Hatley",
-            "id" : "Robbie Hatley",
             "data" : [
                [
                   "Perl",
@@ -258,9 +407,11 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Robbie Hatley"
          },
          {
+            "id" : "Robert DiCicco",
             "data" : [
                [
                   "Perl",
@@ -271,18 +422,17 @@
                   1
                ]
             ],
-            "name" : "Robert DiCicco",
-            "id" : "Robert DiCicco"
+            "name" : "Robert DiCicco"
          },
          {
+            "id" : "Robert Ransbottom",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "name" : "Robert Ransbottom",
-            "id" : "Robert Ransbottom"
+            "name" : "Robert Ransbottom"
          },
          {
             "name" : "Roger Bell_West",
@@ -303,6 +453,7 @@
             ]
          },
          {
+            "name" : "Simon Green",
             "data" : [
                [
                   "Perl",
@@ -313,22 +464,21 @@
                   1
                ]
             ],
-            "id" : "Simon Green",
-            "name" : "Simon Green"
+            "id" : "Simon Green"
          },
          {
-            "id" : "Solathian",
             "name" : "Solathian",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "id" : "Solathian"
          },
          {
-            "id" : "Stephen G. Lynn",
             "name" : "Stephen G. Lynn",
+            "id" : "Stephen G. Lynn",
             "data" : [
                [
                   "Perl",
@@ -341,6 +491,7 @@
             ]
          },
          {
+            "name" : "Thomas Kohler",
             "data" : [
                [
                   "Perl",
@@ -351,10 +502,11 @@
                   2
                ]
             ],
-            "id" : "Thomas Kohler",
-            "name" : "Thomas Kohler"
+            "id" : "Thomas Kohler"
          },
          {
+            "name" : "Ulrich Rieke",
+            "id" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
@@ -364,13 +516,10 @@
                   "Raku",
                   1
                ]
-            ],
-            "name" : "Ulrich Rieke",
-            "id" : "Ulrich Rieke"
+            ]
          },
          {
             "name" : "W. Luis Mochan",
-            "id" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -380,192 +529,43 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "W. Luis Mochan"
          }
       ]
    },
-   "chart" : {
-      "type" : "column"
+   "legend" : {
+      "enabled" : 0
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 219"
    },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
-   "subtitle" : {
-      "text" : "[Champions: 29] Last updated at 2023-06-12 04:11:27 GMT"
-   },
-   "series" : [
-      {
-         "colorByPoint" : 1,
-         "data" : [
-            {
-               "name" : "Arne Sommer",
-               "drilldown" : "Arne Sommer",
-               "y" : 3
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Athanasius",
-               "name" : "Athanasius"
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Avery Adams",
-               "name" : "Avery Adams"
-            },
-            {
-               "name" : "BarrOff",
-               "drilldown" : "BarrOff",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Bruce Gray",
-               "y" : 2,
-               "name" : "Bruce Gray"
-            },
-            {
-               "drilldown" : "David Ferrone",
-               "y" : 2,
-               "name" : "David Ferrone"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "E. Choroba",
-               "name" : "E. Choroba"
-            },
-            {
-               "name" : "Flavio Poletti",
-               "drilldown" : "Flavio Poletti",
-               "y" : 6
-            },
-            {
-               "name" : "Jaldhar H. Vyas",
-               "y" : 5,
-               "drilldown" : "Jaldhar H. Vyas"
-            },
-            {
-               "drilldown" : "Jan Krnavek",
-               "y" : 2,
-               "name" : "Jan Krnavek"
-            },
-            {
-               "y" : 1,
-               "drilldown" : "Jorg Sommrey",
-               "name" : "Jorg Sommrey"
-            },
-            {
-               "y" : 1,
-               "drilldown" : "Lance Wicks",
-               "name" : "Lance Wicks"
-            },
-            {
-               "drilldown" : "Laurent Rosenfeld",
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-               "name" : "Laurent Rosenfeld"
-            },
-            {
-               "name" : "Lubos Kolouch",
-               "y" : 2,
-               "drilldown" : "Lubos Kolouch"
-            },
-            {
-               "drilldown" : "Luca Ferrari",
-               "y" : 8,
-               "name" : "Luca Ferrari"
-            },
-            {
-               "name" : "Mariano Spadaccini",
-               "drilldown" : "Mariano Spadaccini",
-               "y" : 1
-            },
-            {
-               "name" : "Mark Anderson",
-               "drilldown" : "Mark Anderson",
-               "y" : 1
-            },
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-               "y" : 3,
-               "drilldown" : "Matthias Muth",
-               "name" : "Matthias Muth"
-            },
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-               "drilldown" : "Peter Campbell Smith",
-               "y" : 3,
-               "name" : "Peter Campbell Smith"
-            },
-            {
-               "name" : "Robbie Hatley",
-               "drilldown" : "Robbie Hatley",
-               "y" : 2
-            },
-            {
-               "name" : "Robert DiCicco",
-               "drilldown" : "Robert DiCicco",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Robert Ransbottom",
-               "name" : "Robert Ransbottom"
-            },
-            {
-               "name" : "Roger Bell_West",
-               "y" : 5,
-               "drilldown" : "Roger Bell_West"
-            },
-            {
-               "name" : "Simon Green",
-               "y" : 3,
-               "drilldown" : "Simon Green"
-            },
-            {
-               "drilldown" : "Solathian",
-               "y" : 1,
-               "name" : "Solathian"
-            },
-            {
-               "name" : "Stephen G. Lynn",
-               "y" : 3,
-               "drilldown" : "Stephen G. Lynn"
-            },
-            {
-               "name" : "Thomas Kohler",
-               "drilldown" : "Thomas Kohler",
-               "y" : 4
-            },
-            {
-               "drilldown" : "Ulrich Rieke",
-               "y" : 2,
-               "name" : "Ulrich Rieke"
-            },
-            {
-               "name" : "W. Luis Mochan",
-               "drilldown" : "W. Luis Mochan",
-               "y" : 3
-            }
-         ],
-         "name" : "The Weekly Challenge - 219"
-      }
-   ],
-   "legend" : {
-      "enabled" : 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
+   "chart" : {
+      "type" : "column"
    },
-   "title" : {
-      "text" : "The Weekly Challenge - 219"
+   "subtitle" : {
+      "text" : "[Champions: 29] Last updated at 2023-07-07 08:27:47 GMT"
    },
    "plotOptions" : {
       "series" : {
          "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
+            "enabled" : 1,
+            "format" : "{point.y}"
          },
          "borderWidth" : 0
       }
+   },
+   "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/>"
    }
 }
diff --git a/stats/pwc-challenge-220.json b/stats/pwc-challenge-220.json
index 3dd64b4dbb..ba63363185 100644
--- a/stats/pwc-challenge-220.json
+++ b/stats/pwc-challenge-220.json
@@ -1,23 +1,4 @@
 {
-   "title" : {
-      "text" : "The Weekly Challenge - 220"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "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/>"
-   },
-   "subtitle" : {
-      "text" : "[Champions: 33] Last updated at 2023-06-25 09:01:15 GMT"
-   },
    "drilldown" : {
       "series" : [
          {
@@ -31,7 +12,6 @@
             "name" : "Ali Moradi"
          },
          {
-            "name" : "Arne Sommer",
             "id" : "Arne Sommer",
             "data" : [
                [
@@ -42,10 +22,10 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Arne Sommer"
          },
          {
-            "name" : "Athanasius",
             "id" : "Athanasius",
             "data" : [
                [
@@ -56,9 +36,12 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Athanasius"
          },
          {
+            "name" : "Avery Adams",
+            "id" : "Avery Adams",
             "data" : [
                [
                   "Perl",
@@ -68,11 +51,10 @@
                   "Blog",
                   2
                ]
-            ],
-            "id" : "Avery Adams",
-            "name" : "Avery Adams"
+            ]
          },
          {
+            "name" : "BarrOff",
             "id" : "BarrOff",
             "data" : [
                [
@@ -83,8 +65,7 @@
                   "Raku",
                   2
                ]
-            ],
-            "name" : "BarrOff"
+            ]
          },
          {
             "id" : "Bob Lied",
@@ -97,8 +78,6 @@
             "name" : "Bob Lied"
          },
          {
-            "name" : "Bruce Gray",
-            "id" : "Bruce Gray",
             "data" : [
                [
                   "Perl",
@@ -112,7 +91,9 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Bruce Gray",
+            "name" : "Bruce Gray"
          },
          {
             "name" : "Cheok-Yin Fung",
@@ -126,27 +107,25 @@
          },
          {
             "name" : "David Ferrone",
+            "id" : "David Ferrone",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "id" : "David Ferrone"
+            ]
          },
          {
-            "name" : "E. Choroba",
+            "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "E. Choroba"
+            "name" : "E. Choroba"
          },
          {
-            "name" : "Flavio Poletti",
-            "id" : "Flavio Poletti",
             "data" : [
                [
                   "Perl",
@@ -160,10 +139,13 @@
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "id" : "Flavio Poletti",
+            "name" : "Flavio Poletti"
          },
          {
             "name" : "Jaldhar H. Vyas",
+            "id" : "Jaldhar H. Vyas",
             "data" : [
                [
                   "Perl",
@@ -177,41 +159,40 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Jaldhar H. Vyas"
+            ]
          },
          {
+            "name" : "Jan Krnavek",
             "id" : "Jan Krnavek",
             "data" : [
                [
                   "Raku",
                   1
                ]
-            ],
-            "name" : "Jan Krnavek"
+            ]
          },
          {
-            "id" : "John Horner",
+            "name" : "John Horner",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "John Horner"
+            "id" : "John Horner"
          },
          {
+            "name" : "Jorg Sommrey",
             "id" : "Jorg Sommrey",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "name" : "Jorg Sommrey"
+            ]
          },
          {
-            "id" : "Laurent Rosenfeld",
+            "name" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
@@ -226,30 +207,29 @@
                   2
                ]
             ],
-            "name" : "Laurent Rosenfeld"
+            "id" : "Laurent Rosenfeld"
          },
          {
-            "name" : "Lubos Kolouch",
-            "id" : "Lubos Kolouch",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Lubos Kolouch",
+            "name" : "Lubos Kolouch"
          },
          {
-            "id" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
+            "id" : "Mark Anderson",
             "name" : "Mark Anderson"
          },
          {
-            "name" : "Matthias Muth",
             "data" : [
                [
                   "Perl",
@@ -260,20 +240,21 @@
                   1
                ]
             ],
-            "id" : "Matthias Muth"
+            "id" : "Matthias Muth",
+            "name" : "Matthias Muth"
          },
          {
-            "name" : "Niels van Dijke",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Niels van Dijke"
+            "id" : "Niels van Dijke",
+            "name" : "Niels van Dijke"
          },
          {
-            "name" : "Peter Campbell Smith",
+            "id" : "Peter Campbell Smith",
             "data" : [
                [
                   "Perl",
@@ -284,7 +265,7 @@
                   1
                ]
             ],
-            "id" : "Peter Campbell Smith"
+            "name" : "Peter Campbell Smith"
          },
          {
             "data" : [
@@ -297,7 +278,6 @@
             "name" : "Peter Meszaros"
          },
          {
-            "id" : "Robbie Hatley",
             "data" : [
                [
                   "Perl",
@@ -308,10 +288,10 @@
                   1
                ]
             ],
+            "id" : "Robbie Hatley",
             "name" : "Robbie Hatley"
          },
          {
-            "id" : "Robert DiCicco",
             "data" : [
                [
                   "Perl",
@@ -322,21 +302,21 @@
                   2
                ]
             ],
+            "id" : "Robert DiCicco",
             "name" : "Robert DiCicco"
          },
          {
+            "name" : "Robert Ransbottom",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "id" : "Robert Ransbottom",
-            "name" : "Robert Ransbottom"
+            "id" : "Robert Ransbottom"
          },
          {
             "name" : "Roger Bell_West",
-            "id" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -350,9 +330,11 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Roger Bell_West"
          },
          {
+            "name" : "Simon Green",
             "data" : [
                [
                   "Perl",
@@ -363,31 +345,29 @@
                   1
                ]
             ],
-            "id" : "Simon Green",
-            "name" : "Simon Green"
+            "id" : "Simon Green"
          },
          {
             "name" : "Simon Proctor",
-            "id" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Simon Proctor"
          },
          {
+            "name" : "Solathian",
             "id" : "Solathian",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "name" : "Solathian"
+            ]
          },
          {
-            "name" : "Stephen G. Lynn",
             "id" : "Stephen G. Lynn",
             "data" : [
                [
@@ -398,9 +378,11 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Stephen G. Lynn"
          },
          {
+            "name" : "Thomas Kohler",
             "data" : [
                [