- Added solutions by Eric Cheung.

- Added solutions by Mark Anderson.
- Added solutions by Feng Chang.
- Added solutions by PokGoPun.

19 files changed, 2520 insertions, 2379 deletions

diff --git a/challenge-268/eric-cheung/python/ch-1.py b/challenge-268/eric-cheung/python/ch-1.py
new file mode 100755
index 0000000000..093fd3f45c
--- /dev/null
+++ b/challenge-268/eric-cheung/python/ch-1.py
@@ -0,0 +1,25 @@
+

+## Example 1

+## arrX = [3, 7, 5]

+## arrY = [9, 5, 7]

+

+## Example 2

+## arrX = [1, 2, 1]

+## arrY = [5, 4, 4]

+

+## Example 3

+arrX = [2]

+arrY = [5]

+

+arrX = sorted(arrX)

+arrY = sorted(arrY)

+

+nDiff = arrY[0] - arrX[0]

+

+bIsSameDiff = True

+for nIndx in range(1, len(arrX)):

+    if arrY[nIndx] - arrX[nIndx] != nDiff:

+        bIsSameDiff = False

+        break

+

+print (nDiff if bIsSameDiff else "")

diff --git a/challenge-268/eric-cheung/python/ch-2.py b/challenge-268/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..de091f76fe
--- /dev/null
+++ b/challenge-268/eric-cheung/python/ch-2.py
@@ -0,0 +1,15 @@
+

+## arrInt = [2, 5, 3, 4]  ## Example 1

+## arrInt = [9, 4, 1, 3, 6, 4, 6, 1]  ## Example 2

+arrInt = [1, 2, 2, 3]  ## Example 3

+

+arrInt = sorted(arrInt)

+arrOutput = []

+

+while len(arrInt) > 0:

+    arrOutput.append(arrInt[1])

+    arrOutput.append(arrInt[0])

+    del arrInt[1]

+    del arrInt[0]

+

+print (arrOutput)

diff --git a/stats/pwc-challenge-267.json b/stats/pwc-challenge-267.json
new file mode 100644
index 0000000000..1202c517ae
--- /dev/null
+++ b/stats/pwc-challenge-267.json
@@ -0,0 +1,612 @@
+{
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "drilldown" : {
+      "series" : [
+         {
+            "id" : "Adam Russell",
+            "name" : "Adam Russell",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "name" : "Arne Sommer",
+            "id" : "Arne Sommer",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Athanasius",
+            "name" : "Athanasius"
+         },
+         {
+            "id" : "BarrOff",
+            "name" : "BarrOff",
+            "data" : [
+               [
+                  "Perl",
+                  1
+               ],
+               [
+                  "Raku",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Bob Lied",
+            "name" : "Bob Lied"
+         },
+         {
+            "id" : "Bruce Gray",
+            "name" : "Bruce Gray",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Dave Jacoby",
+            "id" : "Dave Jacoby"
+         },
+         {
+            "name" : "David Ferrone",
+            "id" : "David Ferrone",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "E. Choroba",
+            "name" : "E. Choroba",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "name" : "Feng Chang",
+            "id" : "Feng Chang",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Jaldhar H. Vyas",
+            "name" : "Jaldhar H. Vyas"
+         },
+         {
+            "id" : "Jan Krnavek",
+            "name" : "Jan Krnavek",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Jorg Sommrey",
+            "name" : "Jorg Sommrey"
+         },
+         {
+            "id" : "Lance Wicks",
+            "name" : "Lance Wicks",
+            "data" : [
+               [
+                  "Perl",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "name" : "Laurent Rosenfeld",
+            "id" : "Laurent Rosenfeld"
+         },
+         {
+            "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  9
+               ]
+            ]
+         },
+         {
+            "name" : "Mark Anderson",
+            "id" : "Mark Anderson",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Matthew Neleigh",
+            "id" : "Matthew Neleigh"
+         },
+         {
+            "id" : "Matthias Muth",
+            "name" : "Matthias Muth",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Nelo Tovar",
+            "name" : "Nelo Tovar"
+         },
+         {
+            "id" : "Packy Anderson",
+            "name" : "Packy Anderson",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "id" : "Peter Campbell Smith",
+            "name" : "Peter Campbell Smith",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "id" : "Peter Meszaros",
+            "name" : "Peter Meszaros",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "name" : "Princy Mangla",
+            "id" : "Princy Mangla",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Reinier Maliepaard",
+            "id" : "Reinier Maliepaard"
+         },
+         {
+            "name" : "Robbie Hatley",
+            "id" : "Robbie Hatley",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "id" : "Robert Ransbottom",
+            "name" : "Robert Ransbottom",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "Roger Bell_West",
+            "name" : "Roger Bell_West",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "id" : "Thomas Kohler",
+            "name" : "Thomas Kohler"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "Ulrich Rieke",
+            "id" : "Ulrich Rieke"
+         },
+         {
+            "name" : "W. Luis Mochan",
+            "id" : "W. Luis Mochan",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Wanderdoc",
+            "id" : "Wanderdoc"
+         }
+      ]
+   },
+   "series" : [
+      {
+         "data" : [
+            {
+               "name" : "Adam Russell",
+               "drilldown" : "Adam Russell",
+               "y" : 2
+            },
+            {
+               "name" : "Arne Sommer",
+               "drilldown" : "Arne Sommer",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Athanasius",
+               "name" : "Athanasius",
+               "y" : 4
+            },
+            {
+               "drilldown" : "BarrOff",
+               "name" : "BarrOff",
+               "y" : 2
+            },
+            {
+               "y" : 3,
+               "name" : "Bob Lied",
+               "drilldown" : "Bob Lied"
+            },
+            {
+               "name" : "Bruce Gray",
+               "drilldown" : "Bruce Gray",
+               "y" : 2
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby"
+            },
+            {
+               "drilldown" : "David Ferrone",
+               "name" : "David Ferrone",
+               "y" : 2
+            },
+            {
+               "drilldown" : "E. Choroba",
+               "name" : "E. Choroba",
+               "y" : 2
+            },
+            {
+               "y" : 2,
+               "name" : "Feng Chang",
+               "drilldown" : "Feng Chang"
+            },
+            {
+               "name" : "Jaldhar H. Vyas",
+               "drilldown" : "Jaldhar H. Vyas",
+               "y" : 5
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Jan Krnavek",
+               "name" : "Jan Krnavek"
+            },
+            {
+               "name" : "Jorg Sommrey",
+               "drilldown" : "Jorg Sommrey",
+               "y" : 3
+            },
+            {
+               "y" : 1,
+               "drilldown" : "Lance Wicks",
+               "name" : "Lance Wicks"
+            },
+            {
+               "y" : 6,
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "y" : 11,
+               "name" : "Luca Ferrari",
+               "drilldown" : "Luca Ferrari"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Mark Anderson",
+               "name" : "Mark Anderson"
+            },
+            {
+               "drilldown" : "Matthew Neleigh",
+               "name" : "Matthew Neleigh",
+               "y" : 2
+            },
+            {
+               "name" : "Matthias Muth",
+               "drilldown" : "Matthias Muth",
+               "y" : 3
+            },
+            {
+               "y" : 2,
+               "name" : "Nelo Tovar",
+               "drilldown" : "Nelo Tovar"
+            },
+            {
+               "name" : "Packy Anderson",
+               "drilldown" : "Packy Anderson",
+               "y" : 5
+            },
+            {
+               "y" : 3,
+               "name" : "Peter Campbell Smith",
+               "drilldown" : "Peter Campbell Smith"
+            },
+            {
+               "y" : 2,
+               "name" : "Peter Meszaros",
+               "drilldown" : "Peter Meszaros"
+            },
+            {
+               "y" : 2,
+               "name" : "Princy Mangla",
+               "drilldown" : "Princy Mangla"
+            },
+            {
+               "drilldown" : "Reinier Maliepaard",
+               "name" : "Reinier Maliepaard",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Robbie Hatley",
+               "name" : "Robbie Hatley",
+               "y" : 3
+            },
+            {
+               "name" : "Robert Ransbottom",
+               "drilldown" : "Robert Ransbottom",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Roger Bell_West",
+               "name" : "Roger Bell_West",
+               "y" : 5
+            },
+            {
+               "name" : "Thomas Kohler",
+               "drilldown" : "Thomas Kohler",
+               "y" : 4
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Ulrich Rieke",
+               "name" : "Ulrich Rieke"
+            },
+            {
+               "y" : 3,
+               "name" : "W. Luis Mochan",
+               "drilldown" : "W. Luis Mochan"
+            },
+            {
+               "drilldown" : "Wanderdoc",
+               "name" : "Wanderdoc",
+               "y" : 2
+            }
+         ],
+         "name" : "The Weekly Challenge - 267",
+         "colorByPoint" : 1
+      }
+   ],
+   "legend" : {
+      "enabled" : 0
+   },
+   "subtitle" : {
+      "text" : "[Champions: 32] Last updated at 2024-05-06 10:12:17 GMT"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 267"
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "tooltip" : {
+      "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/>"
+   }
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index bd1fa2a3b0..5b9375cfbb 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,303 +1,46 @@
 {
+   "title" : {
+      "text" : "The Weekly Challenge - 268"
+   },
    "series" : [
       {
+         "colorByPoint" : 1,
          "data" : [
             {
-               "name" : "Adam Russell",
-               "y" : 2,
-               "drilldown" : "Adam Russell"
-            },
-            {
-               "name" : "Arne Sommer",
-               "y" : 3,
-               "drilldown" : "Arne Sommer"
-            },
-            {
-               "drilldown" : "Athanasius",
-               "y" : 4,
-               "name" : "Athanasius"
-            },
-            {
                "y" : 2,
-               "drilldown" : "BarrOff",
-               "name" : "BarrOff"
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Bob Lied",
-               "name" : "Bob Lied"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Bruce Gray",
-               "name" : "Bruce Gray"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Dave Jacoby",
-               "name" : "Dave Jacoby"
-            },
-            {
-               "name" : "David Ferrone",
-               "y" : 2,
-               "drilldown" : "David Ferrone"
-            },
-            {
-               "name" : "E. Choroba",
-               "drilldown" : "E. Choroba",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Feng Chang",
-               "name" : "Feng Chang"
-            },
-            {
-               "name" : "Jaldhar H. Vyas",
-               "y" : 5,
-               "drilldown" : "Jaldhar H. Vyas"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Jan Krnavek",
-               "name" : "Jan Krnavek"
-            },
-            {
-               "name" : "Jorg Sommrey",
-               "y" : 3,
-               "drilldown" : "Jorg Sommrey"
-            },
-            {
-               "name" : "Lance Wicks",
-               "drilldown" : "Lance Wicks",
-               "y" : 1
-            },
-            {
-               "drilldown" : "Laurent Rosenfeld",
-               "y" : 6,
-               "name" : "Laurent Rosenfeld"
-            },
-            {
-               "name" : "Luca Ferrari",
-               "drilldown" : "Luca Ferrari",
-               "y" : 11
-            },
-            {
-               "name" : "Mark Anderson",
-               "y" : 2,
-               "drilldown" : "Mark Anderson"
-            },
-            {
-               "name" : "Matthew Neleigh",
-               "drilldown" : "Matthew Neleigh",
-               "y" : 2
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Matthias Muth",
-               "name" : "Matthias Muth"
+               "name" : "Feng Chang",
+               "drilldown" : "Feng Chang"
             },
             {
-               "drilldown" : "Nelo Tovar",
+               "drilldown" : "Mark Anderson",
                "y" : 2,
-               "name" : "Nelo Tovar"
-            },
-            {
-               "y" : 5,
-               "drilldown" : "Packy Anderson",
-               "name" : "Packy Anderson"
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Peter Campbell Smith",
-               "name" : "Peter Campbell Smith"
-            },
-            {
-               "name" : "Peter Meszaros",
-               "drilldown" : "Peter Meszaros",
-               "y" : 2
-            },
-            {
-               "name" : "Princy Mangla",
-               "drilldown" : "Princy Mangla",
-               "y" : 2
-            },
-            {
-               "name" : "Reinier Maliepaard",
-               "y" : 3,
-               "drilldown" : "Reinier Maliepaard"
-            },
-            {
-               "name" : "Robbie Hatley",
-               "y" : 3,
-               "drilldown" : "Robbie Hatley"
-            },
-            {
-               "name" : "Robert Ransbottom",
-               "drilldown" : "Robert Ransbottom",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Roger Bell_West",
-               "y" : 5,
-               "name" : "Roger Bell_West"
-            },
-            {
-               "drilldown" : "Thomas Kohler",
-               "y" : 4,
-               "name" : "Thomas Kohler"
-            },
-            {
-               "name" : "Ulrich Rieke",
-               "drilldown" : "Ulrich Rieke",
-               "y" : 4
-            },
-            {
-               "y" : 3,
-               "drilldown" : "W. Luis Mochan",
-               "name" : "W. Luis Mochan"
-            },
-            {
-               "name" : "Wanderdoc",
-               "y" : 2,
-               "drilldown" : "Wanderdoc"
+               "name" : "Mark Anderson"
             }
          ],
-         "name" : "The Weekly Challenge - 267",
-         "colorByPoint" : 1
+         "name" : "The Weekly Challenge - 268"
       }
    ],
-   "legend" : {
-      "enabled" : 0
-   },
-   "subtitle" : {
-      "text" : "[Champions: 32] Last updated at 2024-05-05 20:46:46 GMT"
+   "xAxis" : {
+      "type" : "category"
    },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         }
-      }
+   "legend" : {
+      "enabled" : 0
+   },
+   "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/>"
    },
    "drilldown" : {
       "series" : [
          {
-            "name" : "Adam Russell",
-            "id" : "Adam Russell",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ]
-         },
-         {
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Arne Sommer",
-            "name" : "Arne Sommer"
-         },
-         {
-            "id" : "Athanasius",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "name" : "Athanasius"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  1
-               ],
-               [
-                  "Raku",
-                  1
-               ]
-            ],
-            "id" : "BarrOff",
-            "name" : "BarrOff"
-         },
-         {
-            "id" : "Bob Lied",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "name" : "Bob Lied"
-         },
-         {
-            "id" : "Bruce Gray",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "name" : "Bruce Gray"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "Dave Jacoby",
-            "name" : "Dave Jacoby"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "David Ferrone",
-            "name" : "David Ferrone"
-         },
-         {
-            "name" : "E. Choroba",
-            "id" : "E. Choroba",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ]
-         },
-         {
-            "name" : "Feng Chang",
             "id" : "Feng Chang",
+            "name" : "Feng Chang",
             "data" : [
                [
                   "Raku",
@@ -308,305 +51,28 @@
          {
             "data" : [
                [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Jaldhar H. Vyas",
-            "name" : "Jaldhar H. Vyas"
-         },
-         {
-            "id" : "Jan Krnavek",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "name" : "Jan Krnavek"
-         },
-         {
-            "name" : "Jorg Sommrey",
-            "id" : "Jorg Sommrey",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ]
-         },
-         {
-            "name" : "Lance Wicks",
-            "data" : [
-               [
-                  "Perl",
-                  1
-               ]
-            ],
-            "id" : "Lance Wicks"
-         },
-         {
-            "name" : "Laurent Rosenfeld",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  2
-               ]
-            ],
-            "id" : "Laurent Rosenfeld"
-         },
-         {
-            "data" : [
-               [
                   "Raku",
                   2
-               ],
-               [
-                  "Blog",
-                  9
                ]
             ],
-            "id" : "Luca Ferrari",
-