- Added solutions by Eric Cheung.

- Added solutions by David Ferrone.
- Added solutions by Santiago Leyva.
- Added solutions by Peter Meszaros.
- Added solutions by Bob Lied.
- Added solutions by W. Luis Mochan.
- Added solutions by Jan Krnavek.

28 files changed, 3156 insertions, 2939 deletions

diff --git a/challenge-300/santiago-leyva/perl/ch-01.pl b/challenge-300/santiago-leyva/perl/ch-1.pl
index 6877b081a0..6877b081a0 100644
--- a/challenge-300/santiago-leyva/perl/ch-01.pl
+++ b/challenge-300/santiago-leyva/perl/ch-1.pl
diff --git a/challenge-300/santiago-leyva/perl/ch-02.pl b/challenge-300/santiago-leyva/perl/ch-2.pl
index 73edff4827..73edff4827 100644
--- a/challenge-300/santiago-leyva/perl/ch-02.pl
+++ b/challenge-300/santiago-leyva/perl/ch-2.pl
diff --git a/challenge-302/eric-cheung/python/ch-1.py b/challenge-302/eric-cheung/python/ch-1.py
new file mode 100755
index 0000000000..8f2173d914
--- /dev/null
+++ b/challenge-302/eric-cheung/python/ch-1.py
@@ -0,0 +1,41 @@
+

+## Ref.:

+## https://leetcode.com/problems/ones-and-zeroes/description/

+## https://stackoverflow.com/questions/1482308/how-to-get-all-subsets-of-a-set-powerset

+

+from itertools import chain, combinations

+

+def GetPowSet(arrSet):

+    return chain.from_iterable(combinations(arrSet, arrSubLoop) for arrSubLoop in range(len(arrSet), 0, -1))

+

+## Example 1

+arrStr = ["10", "0001", "111001", "1", "0"]

+nX = 5

+nY = 3

+

+## Example 2

+## arrStr = ["10", "1", "0"]

+## nX = 1

+## nY = 1

+

+nMaxLenSubSet = 0

+

+for arrLoop in list(GetPowSet(arrStr)):

+    setLoop = list(arrLoop)

+

+    ## print (setLoop)

+

+    nCountOne = sum([strLoop.count("1") for strLoop in setLoop])

+    nCountZero = sum([strLoop.count("0") for strLoop in setLoop])

+

+    if nCountZero > nX:

+        continue

+

+    if nCountOne > nY:

+        continue

+

+    if len(setLoop) > nMaxLenSubSet:

+        nMaxLenSubSet = len(setLoop)

+        break

+

+print (nMaxLenSubSet)

diff --git a/challenge-302/eric-cheung/python/ch-2.py b/challenge-302/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..cb631e67fe
--- /dev/null
+++ b/challenge-302/eric-cheung/python/ch-2.py
@@ -0,0 +1,11 @@
+

+arrInts = [-3, 2, -3, 4, 2]  ## Example 1

+## arrInts = [1, 2]  ## Example 2

+## arrInts = [1, -2, -3]  ## Example 3

+

+arrOutput = [1]

+

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

+    arrOutput.append(1 - sum(arrInts[:nIndx]))

+

+print (max(arrOutput))

diff --git a/stats/pwc-challenge-300.json b/stats/pwc-challenge-300.json
index bfdc9b1839..0da2e5c65a 100644
--- a/stats/pwc-challenge-300.json
+++ b/stats/pwc-challenge-300.json
@@ -1,4 +1,155 @@
 {
+   "title" : {
+      "text" : "The Weekly Challenge - 300"
+   },
+   "series" : [
+      {
+         "data" : [
+            {
+               "name" : "Ali Moradi",
+               "y" : 3,
+               "drilldown" : "Ali Moradi"
+            },
+            {
+               "drilldown" : "Arne Sommer",
+               "y" : 3,
+               "name" : "Arne Sommer"
+            },
+            {
+               "name" : "Athanasius",
+               "y" : 4,
+               "drilldown" : "Athanasius"
+            },
+            {
+               "drilldown" : "BarrOff",
+               "name" : "BarrOff",
+               "y" : 1
+            },
+            {
+               "drilldown" : "Bob Lied",
+               "name" : "Bob Lied",
+               "y" : 2
+            },
+            {
+               "y" : 3,
+               "name" : "Dave Jacoby",
+               "drilldown" : "Dave Jacoby"
+            },
+            {
+               "name" : "David Ferrone",
+               "y" : 2,
+               "drilldown" : "David Ferrone"
+            },
+            {
+               "y" : 2,
+               "name" : "E. Choroba",
+               "drilldown" : "E. Choroba"
+            },
+            {
+               "name" : "Feng Chang",
+               "y" : 2,
+               "drilldown" : "Feng Chang"
+            },
+            {
+               "drilldown" : "Jaldhar H. Vyas",
+               "y" : 5,
+               "name" : "Jaldhar H. Vyas"
+            },
+            {
+               "drilldown" : "Jorg Sommrey",
+               "y" : 3,
+               "name" : "Jorg Sommrey"
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "y" : 4,
+               "name" : "Luca Ferrari"
+            },
+            {
+               "drilldown" : "Mark Anderson",
+               "name" : "Mark Anderson",
+               "y" : 2
+            },
+            {
+               "name" : "Matthew Neleigh",
+               "y" : 2,
+               "drilldown" : "Matthew Neleigh"
+            },
+            {
+               "drilldown" : "Peter Campbell Smith",
+               "y" : 3,
+               "name" : "Peter Campbell Smith"
+            },
+            {
+               "y" : 2,
+               "name" : "Peter Meszaros",
+               "drilldown" : "Peter Meszaros"
+            },
+            {
+               "drilldown" : "Robbie Hatley",
+               "y" : 3,
+               "name" : "Robbie Hatley"
+            },
+            {
+               "drilldown" : "Robert McIntosh",
+               "y" : 2,
+               "name" : "Robert McIntosh"
+            },
+            {
+               "y" : 2,
+               "name" : "Robert Ransbottom",
+               "drilldown" : "Robert Ransbottom"
+            },
+            {
+               "drilldown" : "Roger Bell_West",
+               "y" : 5,
+               "name" : "Roger Bell_West"
+            },
+            {
+               "y" : 3,
+               "name" : "Ryan Thompson",
+               "drilldown" : "Ryan Thompson"
+            },
+            {
+               "name" : "Santiago Leyva",
+               "y" : 2,
+               "drilldown" : "Santiago Leyva"
+            },
+            {
+               "name" : "Simon Green",
+               "y" : 3,
+               "drilldown" : "Simon Green"
+            },
+            {
+               "name" : "Thomas Kohler",
+               "y" : 2,
+               "drilldown" : "Thomas Kohler"
+            },
+            {
+               "drilldown" : "Torgny Lyon",
+               "name" : "Torgny Lyon",
+               "y" : 2
+            },
+            {
+               "y" : 4,
+               "name" : "Ulrich Rieke",
+               "drilldown" : "Ulrich Rieke"
+            },
+            {
+               "drilldown" : "W. Luis Mochan",
+               "y" : 3,
+               "name" : "W. Luis Mochan"
+            },
+            {
+               "drilldown" : "Wanderdoc",
+               "y" : 2,
+               "name" : "Wanderdoc"
+            }
+         ],
+         "colorByPoint" : 1,
+         "name" : "The Weekly Challenge - 300"
+      }
+   ],
    "chart" : {
       "type" : "column"
    },
@@ -11,26 +162,14 @@
          }
       }
    },
-   "title" : {
-      "text" : "The Weekly Challenge - 300"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "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/>"
-   },
-   "subtitle" : {
-      "text" : "[Champions: 27] Last updated at 2024-12-26 20:24:03 GMT"
+   "xAxis" : {
+      "type" : "category"
    },
    "drilldown" : {
       "series" : [
          {
             "name" : "Ali Moradi",
+            "id" : "Ali Moradi",
             "data" : [
                [
                   "Perl",
@@ -40,11 +179,10 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Ali Moradi"
+            ]
          },
          {
-            "name" : "Arne Sommer",
+            "id" : "Arne Sommer",
             "data" : [
                [
                   "Raku",
@@ -55,9 +193,10 @@
                   1
                ]
             ],
-            "id" : "Arne Sommer"
+            "name" : "Arne Sommer"
          },
          {
+            "id" : "Athanasius",
             "data" : [
                [
                   "Perl",
@@ -68,32 +207,29 @@
                   2
                ]
             ],
-            "id" : "Athanasius",
             "name" : "Athanasius"
          },
          {
             "name" : "BarrOff",
-            "id" : "BarrOff",
             "data" : [
                [
                   "Raku",
                   1
                ]
-            ]
+            ],
+            "id" : "BarrOff"
          },
          {
-            "id" : "Bob Lied",
+            "name" : "Bob Lied",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Bob Lied"
+            "id" : "Bob Lied"
          },
          {
-            "name" : "Dave Jacoby",
-            "id" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -103,39 +239,42 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby"
          },
          {
-            "id" : "David Ferrone",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
+            "id" : "David Ferrone",
             "name" : "David Ferrone"
          },
          {
-            "name" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "E. Choroba"
+            "id" : "E. Choroba",
+            "name" : "E. Choroba"
          },
          {
-            "id" : "Feng Chang",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
+            "id" : "Feng Chang",
             "name" : "Feng Chang"
          },
          {
+            "id" : "Jaldhar H. Vyas",
             "data" : [
                [
                   "Perl",
@@ -150,11 +289,9 @@
                   1
                ]
             ],
-            "id" : "Jaldhar H. Vyas",
             "name" : "Jaldhar H. Vyas"
          },
          {
-            "id" : "Jorg Sommrey",
             "data" : [
                [
                   "Perl",
@@ -165,11 +302,11 @@
                   1
                ]
             ],
+            "id" : "Jorg Sommrey",
             "name" : "Jorg Sommrey"
          },
          {
             "name" : "Luca Ferrari",
-            "id" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -179,29 +316,31 @@
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "id" : "Luca Ferrari"
          },
          {
             "name" : "Mark Anderson",
-            "id" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Mark Anderson"
          },
          {
+            "name" : "Matthew Neleigh",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Matthew Neleigh",
-            "name" : "Matthew Neleigh"
+            "id" : "Matthew Neleigh"
          },
          {
+            "id" : "Peter Campbell Smith",
             "data" : [
                [
                   "Perl",
@@ -212,17 +351,16 @@
                   1
                ]
             ],
-            "id" : "Peter Campbell Smith",
             "name" : "Peter Campbell Smith"
          },
          {
-            "id" : "Peter Meszaros",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
+            "id" : "Peter Meszaros",
             "name" : "Peter Meszaros"
          },
          {
@@ -240,14 +378,14 @@
             ]
          },
          {
-            "name" : "Robert McIntosh",
             "id" : "Robert McIntosh",
             "data" : [
                [
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "name" : "Robert McIntosh"
          },
          {
             "name" : "Robert Ransbottom",
@@ -260,7 +398,6 @@
             ]
          },
          {
-            "name" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -275,10 +412,11 @@
                   1
                ]
             ],
-            "id" : "Roger Bell_West"
+            "id" : "Roger Bell_West",
+            "name" : "Roger Bell_West"
          },
          {
-            "name" : "Ryan Thompson",
+            "id" : "Ryan Thompson",
             "data" : [
                [
                   "Perl",
@@ -289,9 +427,21 @@
                   1
                ]
             ],
-            "id" : "Ryan Thompson"
+            "name" : "Ryan Thompson"
+         },
+         {
+            "name" : "Santiago Leyva",
+            "id" : "Santiago Leyva",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
          },
          {
+            "name" : "Simon Green",
+            "id" : "Simon Green",
             "data" : [
                [
                   "Perl",
@@ -301,11 +451,11 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Simon Green",
-            "name" : "Simon Green"
+            ]
          },
          {
+            "name" : "Thomas Kohler",
+            "id" : "Thomas Kohler",
             "data" : [
                [
                   "Perl",
@@ -315,21 +465,20 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Thomas Kohler",
-            "name" : "Thomas Kohler"
+            ]
          },
          {
-            "name" : "Torgny Lyon",
+            "id" : "Torgny Lyon",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Torgny Lyon"
+            "name" : "Torgny Lyon"
          },
          {
+            "id" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
@@ -340,10 +489,11 @@
                   2
                ]
             ],
-            "id" : "Ulrich Rieke",
             "name" : "Ulrich Rieke"
          },
          {
+            "name" : "W. Luis Mochan",
+            "id" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -353,169 +503,34 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "W. Luis Mochan",
-            "name" : "W. Luis Mochan"
+            ]
          },
          {
+            "name" : "Wanderdoc",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Wanderdoc",
-            "name" : "Wanderdoc"
+            "id" : "Wanderdoc"
          }
       ]
    },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "series" : [
-      {
-         "colorByPoint" : 1,
-         "data" : [
-            {
-               "y" : 3,
-               "drilldown" : "Ali Moradi",
-               "name" : "Ali Moradi"
-            },
-            {
-               "name" : "Arne Sommer",
-               "y" : 3,
-               "drilldown" : "Arne Sommer"
-            },
-            {
-               "drilldown" : "Athanasius",
-               "y" : 4,
-               "name" : "Athanasius"
-            },
-            {
-               "name" : "BarrOff",
-               "drilldown" : "BarrOff",
-               "y" : 1
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Bob Lied",
-               "name" : "Bob Lied"
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Dave Jacoby",
-               "name" : "Dave Jacoby"
-            },
-            {
-               "drilldown" : "David Ferrone",
-               "y" : 2,
-               "name" : "David Ferrone"
-            },
-            {
-               "name" : "E. Choroba",
-               "y" : 2,
-               "drilldown" : "E. Choroba"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Feng Chang",
-               "name" : "Feng Chang"
-            },
-            {
-               "name" : "Jaldhar H. Vyas",
-               "y" : 5,
-               "drilldown" : "Jaldhar H. Vyas"
-            },
-            {
-               "name" : "Jorg Sommrey",
-               "drilldown" : "Jorg Sommrey",
-               "y" : 3
-            },
-            {
-               "name" : "Luca Ferrari",
-               "y" : 4,
-               "drilldown" : "Luca Ferrari"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Mark Anderson",
-               "name" : "Mark Anderson"
-            },
-            {
-               "name" : "Matthew Neleigh",
-               "y" : 2,
-               "drilldown" : "Matthew Neleigh"
-            },
-            {
-               "name" : "Peter Campbell Smith",
-               "y" : 3,
-               "drilldown" : "Peter Campbell Smith"
-            },
-            {
-               "name" : "Peter Meszaros",
-               "y" : 2,
-               "drilldown" : "Peter Meszaros"
-            },
-            {
-               "name" : "Robbie Hatley",
-               "drilldown" : "Robbie Hatley",
-               "y" : 3
-            },
-            {
-               "name" : "Robert McIntosh",
-               "y" : 2,
-               "drilldown" : "Robert McIntosh"
-            },
-            {
-               "name" : "Robert Ransbottom",
-               "y" : 2,
-               "drilldown" : "Robert Ransbottom"
-            },
-            {
-               "y" : 5,
-               "drilldown" : "Roger Bell_West",
-               "name" : "Roger Bell_West"
-            },
-            {
-               "name" : "Ryan Thompson",
-               "drilldown" : "Ryan Thompson",
-               "y" : 3
-            },
-            {
-               "drilldown" : "Simon Green",
-               "y" : 3,
-               "name" : "Simon Green"
-            },
-            {
-               "name" : "Thomas Kohler",
-               "y" : 2,
-               "drilldown" : "Thomas Kohler"
-            },
-            {
-               "drilldown" : "Torgny Lyon",
-               "y" : 2,
-               "name" : "Torgny Lyon"
-            },
-            {
-               "name" : "Ulrich Rieke",
-               "y" : 4,
-               "drilldown" : "Ulrich Rieke"
-            },
-            {
-               "y" : 3,
-               "drilldown" : "W. Luis Mochan",
-               "name" : "W. Luis Mochan"
-            },
-            {
-               "name" : "Wanderdoc",
-               "drilldown" : "Wanderdoc",
-               "y" : 2
-            }
-         ],
-         "name" : "The Weekly Challenge - 300"
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
       }
-   ],
+   },
    "legend" : {
       "enabled" : 0
+   },
+   "subtitle" : {
+      "text" : "[Champions: 28] Last updated at 2024-12-30 17:37:41 GMT"
+   },
+   "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/>"
    }
 }
diff --git a/stats/pwc-challenge-301.json b/stats/pwc-challenge-301.json
new file mode 100644
index 0000000000..1deb2971ac
--- /dev/null
+++ b/stats/pwc-challenge-301.json
@@ -0,0 +1,513 @@
+{
+   "subtitle" : {
+      "text" : "[Champions: 27] Last updated at 2024-12-30 17:37:41 GMT"
+   },
+   "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/>"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "drilldown" : {
+      "series" : [
+         {
+            "name" : "Ali Moradi",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Ali Moradi"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Andreas Mahnke",
+            "name" : "Andreas Mahnke"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Arne Sommer",
+            "name" : "Arne Sommer"
+         },
+         {
+            "id" : "Athanasius",
+            "data" : [
+               [
+                  "Perl",
+                  1
+               ],
+               [
+                  "Raku",
+                  1
+               ]
+            ],
+            "name" : "Athanasius"
+         },
+         {
+            "name" : "BarrOff",
+            "data" : [
+               [
+                  "Raku",
+                  1
+               ]
+            ],
+            "id" : "BarrOff"
+         },
+         {
+            "name" : "Bob Lied",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Bob Lied"
+         },
+         {
+            "name" : "Bruno Ramos",
+            "id" : "Bruno Ramos",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "name" : "Dave Jacoby",
+            "id" : "Dave Jacoby",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "id" : "David Ferrone",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "David Ferrone"
+         },
+         {
+            "data" : [
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