i- Added solutions by Mark Anderson.

- Added solutions by PokGoPun.
- Added solutions by Simon Proctor.
- Added solutions by Luca Ferrari.
- Added solutions by Thomas Kohler.
- Added solutions by Peter Campbell Smith.
- Added solutions by Niels van Dijke.
- Added solutions by W. Luis Mochan.
- Added solutions by David Ferrone.
- Added solutions by Dave Jacoby.
- Added solutions by Peter Meszaros.
- Added solutions by Laurent Rosenfeld.

24 files changed, 2769 insertions, 2462 deletions

diff --git a/challenge-250/eric-cheung/python/ch-1.py b/challenge-250/eric-cheung/python/ch-1.py
index 3f0e3c37c1..66f88a07e9 100755
--- a/challenge-250/eric-cheung/python/ch-1.py
+++ b/challenge-250/eric-cheung/python/ch-1.py
@@ -1,10 +1,17 @@
 

-## arrInt = [0, 1, 2]  ## Example 1

-## arrInt = [4, 3, 2, 1]  ## Example 2

-arrInt = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]  ## Example 3

-

-arrOutput = [nIndx for nIndx in range(len(arrInt)) if nIndx % 10 == arrInt[nIndx]]

-if len(arrOutput) > 0:

-    print (arrOutput[0])

-else:

-    print (-1)

+## arrInt = [6, 12, 25, 1]  ## Example 1

+## arrInt = [10, 7, 31, 5, 2, 2]  ## Example 2

+arrInt = [1, 2, 10]  ## Example 3

+

+nSum = 0

+while len(arrInt) > 0:

+    if len(arrInt) == 1:

+        nSum = nSum + arrInt[0]

+        del arrInt[0]

+    else:

+        nSum = nSum + int(str(arrInt[0]) + str(arrInt[-1]))

+        del arrInt[-1]

+        del arrInt[0]

+

+print (nSum)

+

diff --git a/challenge-250/eric-cheung/python/ch-2.py b/challenge-250/eric-cheung/python/ch-2.py
index 43a7617ff9..a659fab6a6 100755
--- a/challenge-250/eric-cheung/python/ch-2.py
+++ b/challenge-250/eric-cheung/python/ch-2.py
@@ -1,9 +1,13 @@
 

-def GetAlphaNumLen (strInput):

-    return int(strInput) if strInput.isnumeric() else len(strInput)

+## Remarks

+## https://github.com/doocs/leetcode/blob/main/solution/1300-1399/1380.Lucky%20Numbers%20in%20a%20Matrix/README_EN.md

 

-## arrAlphaNumStr = ["perl", "2", "000", "python", "r4ku"]  ## Example 1

-arrAlphaNumStr = ["001", "1", "000", "0001"]  ## Example 2

+## arrMatrix = [[3, 7, 8], [9, 11, 13], [15, 16, 17]]  ## Example 1

+## arrMatrix = [[1, 10, 4, 2], [9, 3, 8, 7], [15, 16, 17, 12]]  ## Example 2

+arrMatrix = [[7, 8], [1, 2]]  ## Example 3

 

-arrOutput = [GetAlphaNumLen(strLoop) for strLoop in arrAlphaNumStr]

-print (max(arrOutput))

+setRowMin = {min(rowLoop) for rowLoop in arrMatrix}

+setColMax = {max(colLoop) for colLoop in zip(*arrMatrix)}

+

+arrLuckyNum = list(setRowMin & setColMax)  ## Intersection of Two Sets

+print (arrLuckyNum if len(arrLuckyNum) > 0 else -1)

diff --git a/challenge-251/laurent-rosenfeld/blog.txt b/challenge-251/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..312e6abc5b
--- /dev/null
+++ b/challenge-251/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+https://blogs.perl.org/users/laurent_r/2024/01/perl-weekly-challenge-251-concatenation-value.html
diff --git a/challenge-251/laurent-rosenfeld/perl/ch-1.pl b/challenge-251/laurent-rosenfeld/perl/ch-1.pl
new file mode 100644
index 0000000000..8ff2ab1549
--- /dev/null
+++ b/challenge-251/laurent-rosenfeld/perl/ch-1.pl
@@ -0,0 +1,18 @@
+use strict;
+use warnings;
+use feature 'say';
+
+sub concat_vals {
+    my @in = @_;
+    my $concat;
+    while (@in > 1) {
+        $concat += (shift @in) . (pop @in);
+    }
+    $concat += shift @in if @in > 0; # if we have 1 item left
+    return $concat;
+}
+
+for my $test ([<6 12 25 1>], [<10 7 31 5 2 2>], [<1 2 10>]) {
+    printf "%-15s => ", "@$test";
+    say concat_vals @$test;
+}
diff --git a/challenge-251/laurent-rosenfeld/raku/ch-1.raku b/challenge-251/laurent-rosenfeld/raku/ch-1.raku
new file mode 100644
index 0000000000..341957a396
--- /dev/null
+++ b/challenge-251/laurent-rosenfeld/raku/ch-1.raku
@@ -0,0 +1,13 @@
+sub concat-vals (@in is copy) {
+    my $concat;
+    while @in.elems > 1 {
+        $concat += @in.shift ~ @in.pop;
+    }
+    $concat += shift @in if @in.elems > 0; # last item if any
+    return $concat;
+}
+
+for <6 12 25 1>, <10 7 31 5 2 2>, <1 2 10> -> @test {
+    printf "%-15s => ", "@test[]";
+    say concat-vals @test;
+}
diff --git a/challenge-251/perlboy1967/perl/ch1.pl b/challenge-251/perlboy1967/perl/ch-1.pl
index 57f97135fc..57f97135fc 100755
--- a/challenge-251/perlboy1967/perl/ch1.pl
+++ b/challenge-251/perlboy1967/perl/ch-1.pl
diff --git a/challenge-251/perlboy1967/perl/ch2.pl b/challenge-251/perlboy1967/perl/ch-2.pl
index 60cd0517ed..60cd0517ed 100755
--- a/challenge-251/perlboy1967/perl/ch2.pl
+++ b/challenge-251/perlboy1967/perl/ch-2.pl
diff --git a/stats/pwc-challenge-250.json b/stats/pwc-challenge-250.json
new file mode 100644
index 0000000000..f31e242126
--- /dev/null
+++ b/stats/pwc-challenge-250.json
@@ -0,0 +1,677 @@
+{
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "subtitle" : {
+      "text" : "[Champions: 35] Last updated at 2024-01-08 19:02:16 GMT"
+   },
+   "drilldown" : {
+      "series" : [
+         {
+            "name" : "Adam Russell",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Adam Russell"
+         },
+         {
+            "id" : "Ali Moradi",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Ali Moradi"
+         },
+         {
+            "id" : "Arne Sommer",
+            "name" : "Arne Sommer",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "id" : "Athanasius",
+            "name" : "Athanasius",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "BarrOff",
+            "id" : "BarrOff"
+         },
+         {
+            "id" : "Bob Lied",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Bob Lied"
+         },
+         {
+            "id" : "Bruce Gray",
+            "name" : "Bruce Gray",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Cheok-Yin Fung",
+            "id" : "Cheok-Yin Fung"
+         },
+         {
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "id" : "David Ferrone",
+            "name" : "David Ferrone",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "E. Choroba",
+            "id" : "E. Choroba"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Jaldhar H. Vyas",
+            "id" : "Jaldhar H. Vyas"
+         },
+         {
+            "name" : "Jan Krnavek",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Jan Krnavek"
+         },
+         {
+            "id" : "Jorg Sommrey",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Jorg Sommrey"
+         },
+         {
+            "name" : "Laurent Rosenfeld",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "id" : "Laurent Rosenfeld"
+         },
+         {
+            "name" : "Lubos Kolouch",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Lubos Kolouch"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  8
+               ]
+            ],
+            "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "name" : "Mark Anderson",
+            "id" : "Mark Anderson"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Matthew Neleigh",
+            "id" : "Matthew Neleigh"
+         },
+         {
+            "id" : "Mustafa Aydin",
+            "name" : "Mustafa Aydin",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "Nelo Tovar",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Nelo Tovar"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Niels van Dijke",
+            "id" : "Niels van Dijke"
+         },
+         {
+            "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
+               ]
+            ]
+         },
+         {
+            "name" : "Peter Meszaros",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Peter Meszaros"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Robbie Hatley",
+            "id" : "Robbie Hatley"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "Robert Ransbottom",
+            "id" : "Robert Ransbottom"
+         },
+         {
+            "name" : "Roger Bell_West",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Roger Bell_West"
+         },
+         {
+            "id" : "Simon Green",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Simon Green"
+         },
+         {
+            "name" : "Simon Proctor",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Simon Proctor"
+         },
+         {
+            "id" : "Solathian",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Solathian"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Stephen G. Lynn",
+            "id" : "Stephen G. Lynn"
+         },
+         {
+            "name" : "Thomas Kohler",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "id" : "Thomas Kohler"
+         },
+         {
+            "id" : "Ulrich Rieke",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "Ulrich Rieke"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "W. Luis Mochan",
+            "id" : "W. Luis Mochan"
+         }
+      ]
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         },
+         "borderWidth" : 0
+      }
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "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/>"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 250"
+   },
+   "series" : [
+      {
+         "colorByPoint" : 1,
+         "data" : [
+            {
+               "name" : "Adam Russell",
+               "y" : 2,
+               "drilldown" : "Adam Russell"
+            },
+            {
+               "drilldown" : "Ali Moradi",
+               "y" : 5,
+               "name" : "Ali Moradi"
+            },
+            {
+               "name" : "Arne Sommer",
+               "y" : 3,
+               "drilldown" : "Arne Sommer"
+            },
+            {
+               "name" : "Athanasius",
+               "y" : 4,
+               "drilldown" : "Athanasius"
+            },
+            {
+               "y" : 4,
+               "name" : "BarrOff",
+               "drilldown" : "BarrOff"
+            },
+            {
+               "drilldown" : "Bob Lied",
+               "name" : "Bob Lied",
+               "y" : 2
+            },
+            {
+               "y" : 2,
+               "name" : "Bruce Gray",
+               "drilldown" : "Bruce Gray"
+            },
+            {
+               "y" : 2,
+               "name" : "Cheok-Yin Fung",
+               "drilldown" : "Cheok-Yin Fung"
+            },
+            {
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby",
+               "y" : 3
+            },
+            {
+               "drilldown" : "David Ferrone",
+               "y" : 2,
+               "name" : "David Ferrone"
+            },
+            {
+               "drilldown" : "E. Choroba",
+               "name" : "E. Choroba",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Jaldhar H. Vyas",
+               "y" : 5,
+               "name" : "Jaldhar H. Vyas"
+            },
+            {
+               "y" : 2,
+               "name" : "Jan Krnavek",
+               "drilldown" : "Jan Krnavek"
+            },
+            {
+               "name" : "Jorg Sommrey",
+               "y" : 3,
+               "drilldown" : "Jorg Sommrey"
+            },
+            {
+               "name" : "Laurent Rosenfeld",
+               "y" : 6,
+               "drilldown" : "Laurent Rosenfeld"
+            },
+            {
+               "name" : "Lubos Kolouch",
+               "y" : 5,
+               "drilldown" : "Lubos Kolouch"
+            },
+            {
+               "name" : "Luca Ferrari",
+               "y" : 10,
+               "drilldown" : "Luca Ferrari"
+            },
+            {
+               "drilldown" : "Mark Anderson",
+               "y" : 4,
+               "name" : "Mark Anderson"
+            },
+            {
+               "name" : "Matthew Neleigh",
+               "y" : 2,
+               "drilldown" : "Matthew Neleigh"
+            },
+            {
+               "name" : "Mustafa Aydin",
+               "y" : 2,
+               "drilldown" : "Mustafa Aydin"
+            },
+            {
+               "y" : 2,
+               "name" : "Nelo Tovar",
+               "drilldown" : "Nelo Tovar"
+            },
+            {
+               "name" : "Niels van Dijke",
+               "y" : 2,
+               "drilldown" : "Niels van Dijke"
+            },
+            {
+               "y" : 5,
+               "name" : "Packy Anderson",
+               "drilldown" : "Packy Anderson"
+            },
+            {
+               "y" : 3,
+               "name" : "Peter Campbell Smith",
+               "drilldown" : "Peter Campbell Smith"
+            },
+            {
+               "name" : "Peter Meszaros",
+               "y" : 2,
+               "drilldown" : "Peter Meszaros"
+            },
+            {
+               "y" : 3,
+               "name" : "Robbie Hatley",
+               "drilldown" : "Robbie Hatley"
+            },
+            {
+               "drilldown" : "Robert Ransbottom",
+               "name" : "Robert Ransbottom",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Roger Bell_West",
+               "y" : 5,
+               "name" : "Roger Bell_West"
+            },
+            {
+               "y" : 3,
+               "name" : "Simon Green",
+               "drilldown" : "Simon Green"
+            },
+            {
+               "name" : "Simon Proctor",
+               "y" : 2,
+               "drilldown" : "Simon Proctor"
+            },
+            {
+               "y" : 2,
+               "name" : "Solathian",
+               "drilldown" : "Solathian"
+            },
+            {
+               "drilldown" : "Stephen G. Lynn",
+               "y" : 3,
+               "name" : "Stephen G. Lynn"
+            },
+            {
+               "drilldown" : "Thomas Kohler",
+               "y" : 4,
+               "name" : "Thomas Kohler"
+            },
+            {
+               "name" : "Ulrich Rieke",
+               "y" : 4,
+               "drilldown" : "Ulrich Rieke"
+            },
+            {
+               "drilldown" : "W. Luis Mochan",
+               "name" : "W. Luis Mochan",
+               "y" : 3
+            }
+         ],
+         "name" : "The Weekly Challenge - 250"
+      }
+   ],
+   "xAxis" : {
+      "type" : "category"
+   }
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index c508065653..4a35b7d705 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,220 +1,122 @@
 {
+   "subtitle" : {
+      "text" : "[Champions: 11] Last updated at 2024-01-08 19:11:43 GMT"
+   },
+   "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
+   },
+   "series" : [
+      {
+         "name" : "The Weekly Challenge - 251",
+         "data" : [
+            {
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby",
+               "y" : 3
+            },
+            {
+               "y" : 2,
+               "name" : "David Ferrone",
+               "drilldown" : "David Ferrone"
+            },
+            {
+               "name" : "Laurent Rosenfeld",
+               "y" : 3,
+               "drilldown" : "Laurent Rosenfeld"
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari",
+               "y" : 10
+            },
+            {
+               "y" : 2,
+               "name" : "Mark Anderson",
+               "drilldown" : "Mark Anderson"
+            },
+            {
+               "y" : 2,
+               "name" : "Niels van Dijke",
+               "drilldown" : "Niels van Dijke"
+            },
+            {
+               "drilldown" : "Peter Campbell Smith",
+               "name" : "Peter Campbell Smith",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Peter Meszaros",
+               "name" : "Peter Meszaros",
+               "y" : 2
+            },
+            {
+               "y" : 2,
+               "name" : "Simon Proctor",
+               "drilldown" : "Simon Proctor"
+            },
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+            },
+            {
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+               "drilldown" : "W. Luis Mochan"
+            }
+         ],
+         "colorByPoint" : 1
+      }
+   ],
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