- Added solutions by Laurent Rosenfeld.

- Added solutions by Robert DiCicco.
- Added solutions by Thomas Kohler.

20 files changed, 2267 insertions, 2167 deletions

diff --git a/challenge-246/laurent-rosenfeld/blog1.txt b/challenge-246/laurent-rosenfeld/blog1.txt
new file mode 100644
index 0000000000..0e28fd88c0
--- /dev/null
+++ b/challenge-246/laurent-rosenfeld/blog1.txt
@@ -0,0 +1 @@
+https://blogs.perl.org/users/laurent_r/2023/12/perl-weekly-challenge-246-linear-recurrence-of-second-order.html
diff --git a/challenge-246/laurent-rosenfeld/perl/ch-2.pl b/challenge-246/laurent-rosenfeld/perl/ch-2.pl
new file mode 100644
index 0000000000..fa464dfdcf
--- /dev/null
+++ b/challenge-246/laurent-rosenfeld/perl/ch-2.pl
@@ -0,0 +1,26 @@
+use strict;
+use warnings;
+use feature 'say';
+
+sub linear_rec {
+    my @in = @_;
+    my ($min, $max) = (sort {$a <=> $b} @in)[0, -1];
+    for my $p ($min .. $max) {
+        for my $q ($min .. $max) {
+            for my $i (2..$#in) {
+                last if $in[$i] !=
+                    $p * $in[$i-2] + $q * $in[$i-1];
+                # say "$p $q $i";
+                return ("True:  p = $p, q = $q")
+                    if $i == $#in;
+            }
+        }
+    }
+    return "False";
+}
+
+my @tests = ([<1 1 2 3 5>], [<4 2 4 5 7>], [<4 1 2 -3 8>]);
+for my $test (@tests) {
+    printf "%-12s => ", "@$test";
+    say linear_rec @$test;
+}
diff --git a/challenge-246/laurent-rosenfeld/raku/ch-2.raku b/challenge-246/laurent-rosenfeld/raku/ch-2.raku
new file mode 100644
index 0000000000..9938c4a782
--- /dev/null
+++ b/challenge-246/laurent-rosenfeld/raku/ch-2.raku
@@ -0,0 +1,21 @@
+sub linear-rec (@in) {
+    my @range = @in.minmax;
+    for @range -> $p {
+        for @range -> $q {
+            for 2..@in.end -> $i {
+                last if @in[$i] !=
+                    $p * @in[$i-2] + $q * @in[$i-1];
+                # say "$p $q $i";
+                return ("True:  p = $p, q = $q")
+                    if $i == @in.end;
+            }
+        }
+    }
+    return (False);
+}
+
+my @tests = <1 1 2 3 5>, <4 2 4 5 7>, <4 1 2 -3 8>;
+for @tests -> @test {
+    printf "%-12s => ", "@test[]";
+    say linear-rec @test;
+}
diff --git a/challenge-246/robert-dicicco/raku/ch-1.raku b/challenge-246/robert-dicicco/raku/ch-1.raku
new file mode 100644
index 0000000000..e4ad5a0a78
--- /dev/null
+++ b/challenge-246/robert-dicicco/raku/ch-1.raku
@@ -0,0 +1,29 @@
+#!/usr/bin/env raku
+=begin comment
+-------------------------------------
+AUTHOR: Robert DiCicco
+DATE  : 2023-12-06
+Challenge 246 6 Out of 49  ( Raku )
+-------------------------------------
+=end comment
+
+use v6;
+
+my $cnt = 0;
+my @out = ();
+while 1 == 1 {
+    my $num = 49.rand.Int;
+    if $num > 0 {
+        @out.push: $num;
+        $cnt++;
+    }
+    last if $cnt == 6;
+}
+say @out.sort;
+
+=begin comment
+-------------------------------------
+SAMPLE OUTPUT
+(3 15 25 27 29 42)
+-------------------------------------
+=end comment
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 9c5019eb6b..92be346ec0 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,22 +1,27 @@
 {
+   "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/>"
+   },
    "series" : [
       {
-         "name" : "The Weekly Challenge - 246",
+         "colorByPoint" : 1,
          "data" : [
             {
-               "drilldown" : "Bob Lied",
                "name" : "Bob Lied",
-               "y" : 3
+               "y" : 3,
+               "drilldown" : "Bob Lied"
             },
             {
+               "drilldown" : "Cheok-Yin Fung",
                "y" : 3,
-               "name" : "Cheok-Yin Fung",
-               "drilldown" : "Cheok-Yin Fung"
+               "name" : "Cheok-Yin Fung"
             },
             {
+               "name" : "Dave Jacoby",
                "y" : 3,
-               "drilldown" : "Dave Jacoby",
-               "name" : "Dave Jacoby"
+               "drilldown" : "Dave Jacoby"
             },
             {
                "name" : "David Ferrone",
@@ -24,39 +29,39 @@
                "y" : 2
             },
             {
-               "y" : 2,
+               "name" : "E. Choroba",
                "drilldown" : "E. Choroba",
-               "name" : "E. Choroba"
+               "y" : 2
             },
             {
-               "y" : 2,
                "drilldown" : "Humberto Massa",
+               "y" : 2,
                "name" : "Humberto Massa"
             },
             {
-               "y" : 3,
                "name" : "Laurent Rosenfeld",
+               "y" : 6,
                "drilldown" : "Laurent Rosenfeld"
             },
             {
                "name" : "Luca Ferrari",
-               "drilldown" : "Luca Ferrari",
-               "y" : 10
+               "y" : 10,
+               "drilldown" : "Luca Ferrari"
             },
             {
-               "y" : 2,
                "name" : "Mark Anderson",
-               "drilldown" : "Mark Anderson"
+               "drilldown" : "Mark Anderson",
+               "y" : 2
             },
             {
                "y" : 2,
-               "name" : "Niels van Dijke",
-               "drilldown" : "Niels van Dijke"
+               "drilldown" : "Niels van Dijke",
+               "name" : "Niels van Dijke"
             },
             {
-               "y" : 1,
+               "name" : "Oliver Oviedo",
                "drilldown" : "Oliver Oviedo",
-               "name" : "Oliver Oviedo"
+               "y" : 1
             },
             {
                "y" : 5,
@@ -69,18 +74,23 @@
                "name" : "Peter Campbell Smith"
             },
             {
-               "drilldown" : "Peter Meszaros",
                "name" : "Peter Meszaros",
+               "drilldown" : "Peter Meszaros",
                "y" : 2
             },
             {
-               "name" : "Robert DiCicco",
+               "y" : 2,
                "drilldown" : "Robert DiCicco",
-               "y" : 1
+               "name" : "Robert DiCicco"
             },
             {
-               "drilldown" : "Roger Bell_West",
                "name" : "Roger Bell_West",
+               "drilldown" : "Roger Bell_West",
+               "y" : 4
+            },
+            {
+               "name" : "Thomas Kohler",
+               "drilldown" : "Thomas Kohler",
                "y" : 4
             },
             {
@@ -89,21 +99,39 @@
                "y" : 3
             }
          ],
-         "colorByPoint" : 1
+         "name" : "The Weekly Challenge - 246"
       }
    ],
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 246"
+   },
    "plotOptions" : {
       "series" : {
-         "borderWidth" : 0,
          "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         }
+            "enabled" : 1,
+            "format" : "{point.y}"
+         },
+         "borderWidth" : 0
       }
    },
+   "subtitle" : {
+      "text" : "[Champions: 18] Last updated at 2023-12-06 21:48:05 GMT"
+   },
    "drilldown" : {
       "series" : [
          {
+            "name" : "Bob Lied",
             "data" : [
                [
                   "Perl",
@@ -114,10 +142,11 @@
                   1
                ]
             ],
-            "id" : "Bob Lied",
-            "name" : "Bob Lied"
+            "id" : "Bob Lied"
          },
          {
+            "id" : "Cheok-Yin Fung",
+            "name" : "Cheok-Yin Fung",
             "data" : [
                [
                   "Perl",
@@ -127,13 +156,10 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Cheok-Yin Fung",
-            "name" : "Cheok-Yin Fung"
+            ]
          },
          {
             "name" : "Dave Jacoby",
-            "id" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -143,54 +169,55 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Dave Jacoby"
          },
          {
             "id" : "David Ferrone",
-            "name" : "David Ferrone",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "David Ferrone"
          },
          {
+            "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "E. Choroba",
             "name" : "E. Choroba"
          },
          {
-            "id" : "Humberto Massa",
             "name" : "Humberto Massa",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Humberto Massa"
          },
          {
+            "name" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
-                  1
+                  2
                ],
                [
                   "Raku",
-                  1
+                  2
                ],
                [
                   "Blog",
-                  1
+                  2
                ]
             ],
-            "name" : "Laurent Rosenfeld",
             "id" : "Laurent Rosenfeld"
          },
          {
@@ -204,8 +231,8 @@
                   8
                ]
             ],
-            "id" : "Luca Ferrari",
-            "name" : "Luca Ferrari"
+            "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari"
          },
          {
             "data" : [
@@ -218,24 +245,24 @@
             "id" : "Mark Anderson"
          },
          {
+            "id" : "Niels van Dijke",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Niels van Dijke",
             "name" : "Niels van Dijke"
          },
          {
             "id" : "Oliver Oviedo",
-            "name" : "Oliver Oviedo",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "name" : "Oliver Oviedo"
          },
          {
             "data" : [
@@ -252,10 +279,12 @@
                   1
                ]
             ],
-            "id" : "Packy Anderson",
-            "name" : "Packy Anderson"
+            "name" : "Packy Anderson",
+            "id" : "Packy Anderson"
          },
          {
+            "id" : "Peter Campbell Smith",
+            "name" : "Peter Campbell Smith",
             "data" : [
                [
                   "Perl",
@@ -265,9 +294,7 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Peter Campbell Smith",
-            "name" : "Peter Campbell Smith"
+            ]
          },
          {
             "data" : [
@@ -276,20 +303,25 @@
                   2
                ]
             ],
-            "id" : "Peter Meszaros",
-            "name" : "Peter Meszaros"
+            "name" : "Peter Meszaros",
+            "id" : "Peter Meszaros"
          },
          {
             "id" : "Robert DiCicco",
-            "name" : "Robert DiCicco",
             "data" : [
                [
                   "Perl",
                   1
+               ],
+               [
+                  "Raku",
+                  1
                ]
-            ]
+            ],
+            "name" : "Robert DiCicco"
          },
          {
+            "name" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -300,7 +332,6 @@
                   2
                ]
             ],
-            "name" : "Roger Bell_West",
             "id" : "Roger Bell_West"
          },
          {
@@ -311,6 +342,20 @@
                ],
                [
                   "Blog",
+                  2
+               ]
+            ],
+            "name" : "Thomas Kohler",
+            "id" : "Thomas Kohler"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
                   1
                ]
             ],
@@ -319,29 +364,7 @@
          }
       ]
    },
-   "subtitle" : {
-      "text" : "[Champions: 17] Last updated at 2023-12-06 11:02:24 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/>"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
    "chart" : {
       "type" : "column"
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "legend" : {
-      "enabled" : 0
-   },
-   "title" : {
-      "text" : "The Weekly Challenge - 246"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 7fc5e8d381..b97c4faaef 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,15 +1,6 @@
 {
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
-            "fontFamily" : "Verdana, sans-serif",
-            "fontSize" : "13px"
-         }
-      }
-   },
-   "chart" : {
-      "type" : "column"
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    },
    "yAxis" : {
       "min" : 0,
@@ -17,47 +8,56 @@
          "text" : null
       }
    },
-   "subtitle" : {
-      "text" : "Last updated at 2023-12-06 11:02:24 GMT"
-   },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
    "series" : [
       {
          "dataLabels" : {
             "align" : "right",
-            "format" : "{point.y:.0f}",
-            "y" : 10,
             "color" : "#FFFFFF",
-            "rotation" : -90,
-            "enabled" : "true",
             "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            }
+               "fontFamily" : "Verdana, sans-serif",
+               "fontSize" : "13px"
+            },
+            "y" : 10,
+            "enabled" : "true",
+            "format" : "{point.y:.0f}",
+            "rotation" : -90
          },
+         "name" : "Contributions",
          "data" : [
             [
                "Blog",
-               4276
+               4279
             ],
             [
                "Perl",
-               12694
+               12697
             ],
             [
                "Raku",
-               7320
+               7322
             ]
-         ],
-         "name" : "Contributions"
+         ]
       }
    ],
+   "legend" : {
+      "enabled" : "false"
+   },
+   "xAxis" : {
+      "labels" : {
+         "style" : {
+            "fontFamily" : "Verdana, sans-serif",
+            "fontSize" : "13px"
+         }
+      },
+      "type" : "category"
+   },
    "title" : {
       "text" : "The Weekly Challenge Contributions [2019 - 2023]"
    },
-   "legend" : {
-      "enabled" : "false"
+   "subtitle" : {
+      "text" : "Last updated at 2023-12-06 21:48:05 GMT"
+   },
+   "chart" : {
+      "type" : "column"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index be234dd0af..601ec2d319 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,20 +1,8 @@
 {
-   "xAxis" : {
-      "type" : "category"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "chart" : {
-      "type" : "column"
-   },
    "drilldown" : {
       "series" : [
          {
             "id" : "001",
-            "name" : "001",
             "data" : [
                [
                   "Perl",
@@ -28,9 +16,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "001"
          },
          {
+            "id" : "002",
             "data" : [
                [
                   "Perl",
@@ -45,7 +35,6 @@
                   10
                ]
             ],
-            "id" : "002",
             "name" : "002"
          },
          {
@@ -63,10 +52,12 @@
                   9
                ]
             ],
-            "id" : "003",
-            "name" : "003"
+            "name" : "003",
+            "id" : "003"
          },
          {
+            "id" : "004",
+            "name" : "004",
             "data" : [
                [
                   "Perl",
@@ -80,13 +71,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "004",
-            "id" : "004"
+            ]
          },
          {
-            "id" : "005",
-            "name" : "005",
             "data" : [
                [
                   "Perl",
@@ -100,10 +87,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "005",
+            "id" : "005"
          },
          {
-            "id" : "006",
             "name" : "006",
             "data" : [
                [
@@ -118,7 +106,8 @@
                   "Blog",
                   7
                ]
-            ]
+            ],
+            "id" : "006"
          },
          {
             "data" : [
@@ -139,6 +128,7 @@
             "id" : "007"
          },
          {
+            "name" : "008",
             "data" : [
                [
                   "Perl",
@@ -153,10 +143,11 @@
                   12
                ]
             ],
-            "name" : "008",
             "id" : "008"
          },
          {
+            "id" : "009",
+            "name" : "009",
             "data" : [
                [
                   "Perl",
@@ -170,13 +161,10 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "009",
-            "name" : "009"
+            ]
          },
          {
             "id" : "010",
-            "name" : "010",
             "data" : [
                [
                   "Perl",
@@ -190,11 +178,11 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "010"
          },
          {
             "name" : "011",
-            "id" : "011",
             "data" : [
                [
                   "Perl",
@@ -208,11 +196,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "011"
          },
          {
             "name" : "012",
-            "id" : "012",
             "data" : [
                [
                   "Perl",
@@ -226,11 +214,10 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "id" : "012"
          },
          {
-            "id" : "013",
-            "name" : "013",
             "data" : [
                [
                   "Perl",
@@ -244,9 +231,13 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "name" : "013",
+            "id" : "013"
          },
          {
+            "id" : "014",
+            "name" : "014",
             "data" : [
                [
                   "Perl",
@@ -260,11 +251,10 @@
                   "Blog",
                   15
                ]
-            ],
-            "name" : "014",
-            "id" : "014"
+            ]
          },
          {
+            "name" : "015",
             "data" : [
                [
                   "Perl",
@@ -279,12 +269,11 @@
                   15
                ]
             ],
-            "id" : "015",
-            "name" : "015"
+            "id" : "015"
          },
          {
-            "name" : "016",
             "id" : "016",
+            "name" : "016",
             "data" : [
                [
                   "Perl",
@@ -301,7 +290,6 @@
             ]
          },
          {
-            "name" : "017",
             "id" : "017",
             "data" : [
                [
@@ -316,9 +304,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "017"
          },
          {
+            "name" : "018",
             "data" : [
                [
                   "Perl",
@@ -333,10 +323,10 @@
                   14
                ]
             ],
-            "name" : "018",
             "id" : "018"
          },
          {
+            "name" : "019",
             "data" : [
                [
                   "Perl",
@@ -351,12 +341,9 @@
                   13
                ]
             ],
-            "name" : "019",
             "id" : "019"
          },
          {
-            "id" : "020",
-            "name" : "020",
             "data" : [
                [
                   "Perl",
@@ -370,11 +357,12 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "name" : "020",
+            "id" : "020"
          },
          {
             "name" : "021",
-            "id" : "021",
             "data" : [
                [
                   "Perl",
@@ -388,11 +376,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "021"
          },
          {
             "name" : "022",
-            "id" : "022",
             "data" : [
                [
                   "Perl",
@@ -406,9 +394,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "022"
          },
          {
+            "id" : "023",
             "data" : [
                [
                   "Perl",
@@ -423,10 +413,10 @@
                   12
                ]
             ],
-            "id" : "023",
             "name" : "023"
          },
          {
+            "name" : "024",
             "data" : [
                [
                   "Perl",
@@ -441,12 +431,11 @@
                   11
                ]
             ],
-            "id" : "024",
-            "name" : "024"
+            "id" : "024"
          },
          {
-            "name" : "025",
             "id" : "025",
+            "name" : "025",
             "data" : [
                [
                   "Perl",
@@ -463,6 +452,7 @@
             ]
          },
          {
+            "name" : "026",
             "data" : [
                [
                   "Perl",
@@ -477,8 +467,7 @@
                   10
                ]
             ],
-            "id" : "026",
-            "name" : "026"
+            "id" : "026"
          },
          {
             "id" : "027",
@@ -499,8 +488,6 @@
             ]
          },
          {
-            "name" : "028",
-            "id" : "028",
             "data" : [
                [
                   "Perl",
@@ -514,11 +501,11 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "name" : "028",
+            "id" : "028"
          },
          {
-            "name" : "029",
-            "id" : "029",
             "data" : [
                [
                   "Perl",
@@ -532,9 +519,12 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "029",
+            "id" : "029"
          },
          {
+            "id" : "030",
             "data" : [
                [
                   "Perl",
@@ -549,10 +539,11 @@
                   10
                ]
             ],
-            "name" : "030",
-            "id" : "030"
+            "name" : "030"
          },
          {
+            "id" : "031",
+            "name" : "031",
             "data" : [
                [
                   "Perl",
@@ -566,13 +557,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "031",
-            "id" : "031"
+            ]
          },
          {
             "id" : "032",
-            "name" : "032",
             "data" : [
                [
                   "Perl",
@@ -586,9 +574,12 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "032"
          },
          {
+            "id" : "033",
+            "name" : "033",
             "data" : [
                [
                   "Perl",
@@ -602,11 +593,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "033",
-            "name" : "033"
+            ]
          },
          {
+            "id" : "034",
             "data" : [
                [
                   "Perl",
@@ -621,12 +611,10 @@
                   11
                ]
             ],
-            "name" : "034",
-            "id" : "03