- Added solutions by Feng Chang.

- Added solutions by Eric Cheung.
- Added solutions by Andrew Shitov.
- Added solutions by E. Choroba.
- Added solutions by Andreas Mahnke.
- Added solutions by Peter Campbell Smith.
- Added solutions by Neils van Dijke.
- Added solutions by Luca Ferrari.
- Added solutions by PokGoPun.
- Added solutions by David Ferrone.
- Added solutions by W. Luis Mochan.
- Added solutions by Peter Meszaros.
- Added solutions by Conor Hoekstra.
- Added solutions by Roger Bell_West.
- Added solutions by Kjetil Skotheim.

28 files changed, 754 insertions, 413 deletions

diff --git a/challenge-323/eric-cheung/python/ch-1.py b/challenge-323/eric-cheung/python/ch-1.py
new file mode 100755
index 0000000000..c5134cdcab
--- /dev/null
+++ b/challenge-323/eric-cheung/python/ch-1.py
@@ -0,0 +1,8 @@
+

+## arrOperations = ["--x", "x++", "x++"]  ## Example 1

+## arrOperations = ["x++", "++x", "x++"]  ## Example 2

+arrOperations = ["x++", "++x", "--x", "x--"]  ## Example 3

+

+arrOutput = [1 if "++" in strOperator else -1 for strOperator in arrOperations]

+

+print (sum(arrOutput))

diff --git a/challenge-323/eric-cheung/python/ch-2.py b/challenge-323/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..50e9c6117f
--- /dev/null
+++ b/challenge-323/eric-cheung/python/ch-2.py
@@ -0,0 +1,47 @@
+

+## Ref.:

+## https://leetcode.com/problems/calculate-amount-paid-in-taxes/description/

+

+## Example 1

+nIncome = 10

+arrTax = [[3, 50], [7, 10], [12, 25]]

+

+## Example 2

+## nIncome = 2

+## arrTax = [[1, 0], [4, 25], [5, 50]]

+

+## Example 3

+## nIncome = 0

+## arrTax = [[2, 50]]

+

+nBalance = nIncome

+nPrevTaxCeil = 0

+dTaxAmout = 0

+

+for arrTaxPair in arrTax:

+    if nBalance == 0:

+        break

+

+    nTempTax = arrTaxPair[0]

+    nCeil = nTempTax - nPrevTaxCeil

+    dTaxPer = arrTaxPair[1] / 100

+

+    ## if nBalance >= nCeil:

+        ## dTaxAmout = dTaxAmout + nCeil * dTaxPer

+        ## nBalance = nBalance - nCeil

+    ## else:

+        ## dTaxAmout = dTaxAmout + nBalance * dTaxPer

+        ## nBalance = 0

+

+    nTempAmount = min(nCeil, nBalance)

+    dTaxAmout = dTaxAmout + nTempAmount * dTaxPer

+    nBalance = nBalance - nTempAmount

+

+    nPrevTaxCeil = nTempTax

+

+    ## print ("")

+    ## print ("===")

+    ## print (nBalance, dTaxAmout)

+    ## print ("===")

+

+print (dTaxAmout)

diff --git a/challenge-323/perlboy1967/perl/ch1.pl b/challenge-323/perlboy1967/perl/ch-1.pl
index a9097270d9..a9097270d9 100755
--- a/challenge-323/perlboy1967/perl/ch1.pl
+++ b/challenge-323/perlboy1967/perl/ch-1.pl
diff --git a/challenge-323/perlboy1967/perl/ch2.pl b/challenge-323/perlboy1967/perl/ch-2.pl
index 25fa9b9d2f..25fa9b9d2f 100755
--- a/challenge-323/perlboy1967/perl/ch2.pl
+++ b/challenge-323/perlboy1967/perl/ch-2.pl
diff --git a/stats/pwc-challenge-322.json b/stats/pwc-challenge-322.json
new file mode 100644
index 0000000000..e2d319e3a1
--- /dev/null
+++ b/stats/pwc-challenge-322.json
@@ -0,0 +1,563 @@
+{
+   "chart" : {
+      "type" : "column"
+   },
+   "drilldown" : {
+      "series" : [
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "id" : "Adam Russell",
+            "name" : "Adam Russell"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Ali Moradi",
+            "name" : "Ali Moradi"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Andreas Mahnke",
+            "name" : "Andreas Mahnke"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Andrew Shitov",
+            "name" : "Andrew Shitov"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Arne Sommer",
+            "name" : "Arne Sommer"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Athanasius",
+            "name" : "Athanasius"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Bob Lied",
+            "name" : "Bob Lied"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "David Ferrone",
+            "name" : "David Ferrone"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "E. Choroba",
+            "name" : "E. Choroba"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Feng Chang",
+            "name" : "Feng Chang"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Jaldhar H. Vyas",
+            "name" : "Jaldhar H. Vyas"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Jan Krnavek",
+            "name" : "Jan Krnavek"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Jorg Sommrey",
+            "name" : "Jorg Sommrey"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  10
+               ]
+            ],
+            "id" : "Luca Ferrari",
+            "name" : "Luca Ferrari"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Mark Anderson",
+            "name" : "Mark Anderson"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Matthias Muth",
+            "name" : "Matthias Muth"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Niels van Dijke",
+            "name" : "Niels van Dijke"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Packy Anderson",
+            "name" : "Packy Anderson"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Peter Campbell Smith",
+            "name" : "Peter Campbell Smith"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Peter Meszaros",
+            "name" : "Peter Meszaros"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Robbie Hatley",
+            "name" : "Robbie Hatley"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Robert Ransbottom",
+            "name" : "Robert Ransbottom"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Roger Bell_West",
+            "name" : "Roger Bell_West"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Simon Green",
+            "name" : "Simon Green"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Ulrich Rieke",
+            "name" : "Ulrich Rieke"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "W. Luis Mochan",
+            "name" : "W. Luis Mochan"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Wanderdoc",
+            "name" : "Wanderdoc"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Yitzchak Scott-Thoennes",
+            "name" : "Yitzchak Scott-Thoennes"
+         }
+      ]
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         }
+      }
+   },
+   "series" : [
+      {
+         "colorByPoint" : 1,
+         "data" : [
+            {
+               "drilldown" : "Adam Russell",
+               "name" : "Adam Russell",
+               "y" : 4
+            },
+            {
+               "drilldown" : "Ali Moradi",
+               "name" : "Ali Moradi",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Andreas Mahnke",
+               "name" : "Andreas Mahnke",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Andrew Shitov",
+               "name" : "Andrew Shitov",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Arne Sommer",
+               "name" : "Arne Sommer",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Athanasius",
+               "name" : "Athanasius",
+               "y" : 4
+            },
+            {
+               "drilldown" : "Bob Lied",
+               "name" : "Bob Lied",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby",
+               "y" : 3
+            },
+            {
+               "drilldown" : "David Ferrone",
+               "name" : "David Ferrone",
+               "y" : 2
+            },
+            {
+               "drilldown" : "E. Choroba",
+               "name" : "E. Choroba",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Feng Chang",
+               "name" : "Feng Chang",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Jaldhar H. Vyas",
+               "name" : "Jaldhar H. Vyas",
+               "y" : 5
+            },
+            {
+               "drilldown" : "Jan Krnavek",
+               "name" : "Jan Krnavek",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Jorg Sommrey",
+               "name" : "Jorg Sommrey",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari",
+               "y" : 12
+            },
+            {
+               "drilldown" : "Mark Anderson",
+               "name" : "Mark Anderson",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Matthias Muth",
+               "name" : "Matthias Muth",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Niels van Dijke",
+               "name" : "Niels van Dijke",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Packy Anderson",
+               "name" : "Packy Anderson",
+               "y" : 5
+            },
+            {
+               "drilldown" : "Peter Campbell Smith",
+               "name" : "Peter Campbell Smith",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Peter Meszaros",
+               "name" : "Peter Meszaros",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Robbie Hatley",
+               "name" : "Robbie Hatley",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Robert Ransbottom",
+               "name" : "Robert Ransbottom",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Roger Bell_West",
+               "name" : "Roger Bell_West",
+               "y" : 5
+            },
+            {
+               "drilldown" : "Simon Green",
+               "name" : "Simon Green",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Ulrich Rieke",
+               "name" : "Ulrich Rieke",
+               "y" : 4
+            },
+            {
+               "drilldown" : "W. Luis Mochan",
+               "name" : "W. Luis Mochan",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Wanderdoc",
+               "name" : "Wanderdoc",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Yitzchak Scott-Thoennes",
+               "name" : "Yitzchak Scott-Thoennes",
+               "y" : 2
+            }
+         ],
+         "name" : "The Weekly Challenge - 322"
+      }
+   ],
+   "subtitle" : {
+      "text" : "[Champions: 29] Last updated at 2025-05-27 10:38:16 GMT"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 322"
+   },
+   "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/>"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   }
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 164820ae4a..fccc1fd507 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -12,20 +12,6 @@
                ],
                [
                   "Blog",
-                  2
-               ]
-            ],
-            "id" : "Adam Russell",
-            "name" : "Adam Russell"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
                   1
                ]
             ],
@@ -55,62 +41,6 @@
          {
             "data" : [
                [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Arne Sommer",
-            "name" : "Arne Sommer"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "id" : "Athanasius",
-            "name" : "Athanasius"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Bob Lied",
-            "name" : "Bob Lied"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Dave Jacoby",
-            "name" : "Dave Jacoby"
-         },
-         {
-            "data" : [
-               [
                   "Perl",
                   2
                ]
@@ -143,42 +73,10 @@
                [
                   "Perl",
                   2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Jaldhar H. Vyas",
-            "name" : "Jaldhar H. Vyas"
-         },
-         {
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "id" : "Jan Krnavek",
-            "name" : "Jan Krnavek"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
                ]
             ],
-            "id" : "Jorg Sommrey",
-            "name" : "Jorg Sommrey"
+            "id" : "Kjetil Skotheim",
+            "name" : "Kjetil Skotheim"
          },
          {
             "data" : [
@@ -197,30 +95,6 @@
          {
             "data" : [
                [
-                  "Raku",
-                  2
-               ]
-            ],
-            "id" : "Mark Anderson",
-            "name" : "Mark Anderson"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Matthias Muth",
-            "name" : "Matthias Muth"
-         },
-         {
-            "data" : [
-               [
                   "Perl",
                   2
                ]
@@ -235,24 +109,6 @@
                   2
                ],
                [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Packy Anderson",
-            "name" : "Packy Anderson"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
                   "Blog",
                   1
                ]
@@ -277,38 +133,10 @@
                   2
                ],
                [
-                  "Blog",
-                  1
-               ]
-            ],
-            "id" : "Robbie Hatley",
-            "name" : "Robbie Hatley"
-         },
-         {
-            "data" : [
-               [
                   "Raku",
                   2
                ]
             ],
-            "id" : "Robert Ransbottom",
-            "name" : "Robert Ransbottom"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
             "id" : "Roger Bell_West",
             "name" : "Roger Bell_West"
          },
@@ -323,56 +151,8 @@
                   1
                ]
             ],
-            "id" : "Simon Green",
-            "name" : "Simon Green"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "id" : "Ulrich Rieke",
-            "name" : "Ulrich Rieke"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
             "id" : "W. Luis Mochan",
             "name" : "W. Luis Mochan"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "Wanderdoc",
-            "name" : "Wanderdoc"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "Yitzchak Scott-Thoennes",
-            "name" : "Yitzchak Scott-Thoennes"
          }
       ]
    },
@@ -393,11 +173,6 @@
          "colorByPoint" : 1,
          "data" : [
             {
-               "drilldown" : "Adam Russell",
-               "name" : "Adam Russell",
-               "y" : 4
-            },
-            {
                "drilldown" : "Ali Moradi",
                "name" : "Ali Moradi",
                "y" : 3
@@ -413,26 +188,6 @@
                "y" : 2
             },
             {
-               "drilldown" : "Arne Sommer",
-               "name" : "Arne Sommer",
-               "y" : 3
-            },
-            {
-               "drilldown" : "Athanasius",
-               "name" : "Athanasius",
-               "y" : 4
-            },
-            {
-               "drilldown" : "Bob Lied",
-               "name" : "Bob Lied",
-               "y" : 3
-            },
-            {
-               "drilldown" : "Dave Jacoby",
-               "name" : "Dave Jacoby",
-               "y" : 3
-            },
-            {
                "drilldown" : "David Ferrone",
                "name" : "David Ferrone",
                "y" : 2
@@ -448,46 +203,21 @@
                "y" : 2
             },
             {
-               "drilldown" : "Jaldhar H. Vyas",
-               "name" : "Jaldhar H. Vyas",
-               "y" : 5
-            },
-            {
-               "d