- Added solutions by Laurent Rosenfeld.

19 files changed, 1932 insertions, 1842 deletions

diff --git a/challenge-159/laurent-rosenfeld/blog.txt b/challenge-159/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..444b3d9087
--- /dev/null
+++ b/challenge-159/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+http://blogs.perl.org/users/laurent_r/2022/04/perl-weekly-challenge-159-farey-sequence-and-mobius-number.html
diff --git a/challenge-159/laurent-rosenfeld/perl/ch-1.pl b/challenge-159/laurent-rosenfeld/perl/ch-1.pl
new file mode 100644
index 0000000000..a9455fda1f
--- /dev/null
+++ b/challenge-159/laurent-rosenfeld/perl/ch-1.pl
@@ -0,0 +1,23 @@
+use strict;
+use warnings;
+use feature "say";
+
+sub farey {
+    my $n = shift;
+    my (@out, %seen);
+    for my $den (1..$n) {
+        for my $num (0..$den) {
+            next if exists $seen{$num/$den};
+            push @out, [$num, $den];
+            $seen{$num/$den} = 1;
+        }
+    }
+    return @out;
+}
+for my $test (3..7) {
+    my @result = sort { $a->[0]/$a->[1] <=> $b->[0]/$b->[1] } farey($test);
+    print "$test: ";
+    print "$_->[0]/$_->[1] " for @result;
+    say "";
+
+}
diff --git a/challenge-159/laurent-rosenfeld/perl/ch-2.pl b/challenge-159/laurent-rosenfeld/perl/ch-2.pl
new file mode 100644
index 0000000000..c478576fd4
--- /dev/null
+++ b/challenge-159/laurent-rosenfeld/perl/ch-2.pl
@@ -0,0 +1,18 @@
+use strict;
+use warnings;
+use feature "say";
+
+sub moebius {
+    my $n = shift;
+    my %factors;
+    for my $i (2..$n) {
+        while  ($n % $i == 0) {
+            $factors{$i}++;
+            $n /= $i;
+        }
+    }
+    return 0 if grep $_ > 1, values %factors;
+    return 1 unless (scalar keys %factors) % 2;
+    return -1;
+}
+say "$_: ", moebius $_ for 1..20;
diff --git a/challenge-159/laurent-rosenfeld/raku/ch-1.raku b/challenge-159/laurent-rosenfeld/raku/ch-1.raku
new file mode 100644
index 0000000000..3041e71782
--- /dev/null
+++ b/challenge-159/laurent-rosenfeld/raku/ch-1.raku
@@ -0,0 +1,12 @@
+sub farey (Int $n) {
+    my @out;
+    for 1..$n -> $den {
+        for 0..$den -> $num {
+            push @out, $num/$den;
+        }
+    }
+    return @out.Set;
+}
+for 3..7 -> $test {
+    say "$test -> ", map { .numerator ~ "/" ~ .denominator },  sort farey($test).keys;
+}
diff --git a/challenge-159/laurent-rosenfeld/raku/ch-2.raku b/challenge-159/laurent-rosenfeld/raku/ch-2.raku
new file mode 100644
index 0000000000..270986f6a1
--- /dev/null
+++ b/challenge-159/laurent-rosenfeld/raku/ch-2.raku
@@ -0,0 +1,13 @@
+sub möbius ($n is copy) {
+    my %factors;
+    for 2..$n -> $i {
+        while  $n %% $i {
+            %factors{$i}++;
+            $n /= $i;
+        }
+    }
+    return 0 if %factors.values.any > 1;
+    return 1 if (%factors.keys.elems %% 2);
+    return -1;
+}
+say "$_: ", möbius $_ for 1..20;
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index fab8492398..54d22abe2a 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,120 +1,17 @@
 {
-   "tooltip" : {
-      "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/>",
-      "followPointer" : 1
-   },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
-      }
-   },
-   "subtitle" : {
-      "text" : "[Champions: 16] Last updated at 2022-04-07 14:05:06 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"
    },
-   "title" : {
-      "text" : "The Weekly Challenge - 159"
-   },
-   "series" : [
-      {
-         "name" : "The Weekly Challenge - 159",
-         "colorByPoint" : 1,
-         "data" : [
-            {
-               "drilldown" : "Dave Jacoby",
-               "y" : 3,
-               "name" : "Dave Jacoby"
-            },
-            {
-               "drilldown" : "E. Choroba",
-               "y" : 2,
-               "name" : "E. Choroba"
-            },
-            {
-               "y" : 6,
-               "drilldown" : "Flavio Poletti",
-               "name" : "Flavio Poletti"
-            },
-            {
-               "name" : "James Smith",
-               "drilldown" : "James Smith",
-               "y" : 3
-            },
-            {
-               "drilldown" : "Luca Ferrari",
-               "y" : 8,
-               "name" : "Luca Ferrari"
-            },
-            {
-               "name" : "Mark Anderson",
-               "y" : 2,
-               "drilldown" : "Mark Anderson"
-            },
-            {
-               "drilldown" : "Marton Polgar",
-               "y" : 2,
-               "name" : "Marton Polgar"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Matthew Neleigh",
-               "name" : "Matthew Neleigh"
-            },
-            {
-               "name" : "Paulo Custodio",
-               "drilldown" : "Paulo Custodio",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "drilldown" : "PokGoPun",
-               "name" : "PokGoPun"
-            },
-            {
-               "name" : "Robert DiCicco",
-               "y" : 2,
-               "drilldown" : "Robert DiCicco"
-            },
-            {
-               "name" : "Robert Ransbottom",
-               "drilldown" : "Robert Ransbottom",
-               "y" : 2
-            },
-            {
-               "y" : 4,
-               "drilldown" : "Roger Bell_West",
-               "name" : "Roger Bell_West"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Simon Proctor",
-               "name" : "Simon Proctor"
-            },
-            {
-               "y" : 4,
-               "drilldown" : "Ulrich Rieke",
-               "name" : "Ulrich Rieke"
-            },
-            {
-               "y" : 3,
-               "drilldown" : "W. Luis Mochan",
-               "name" : "W. Luis Mochan"
-            }
-         ]
-      }
-   ],
    "drilldown" : {
       "series" : [
          {
@@ -133,17 +30,16 @@
          },
          {
             "id" : "E. Choroba",
-            "name" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "E. Choroba"
          },
          {
             "name" : "Flavio Poletti",
-            "id" : "Flavio Poletti",
             "data" : [
                [
                   "Perl",
@@ -157,24 +53,42 @@
                   "Blog",
                   2
                ]
+            ],
+            "id" : "Flavio Poletti"
+         },
+         {
+            "name" : "James Smith",
+            "id" : "James Smith",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
             ]
          },
          {
+            "name" : "Laurent Rosenfeld",
+            "id" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
                   2
                ],
                [
+                  "Raku",
+                  2
+               ],
+               [
                   "Blog",
                   1
                ]
-            ],
-            "name" : "James Smith",
-            "id" : "James Smith"
+            ]
          },
          {
-            "id" : "Luca Ferrari",
             "name" : "Luca Ferrari",
             "data" : [
                [
@@ -185,7 +99,8 @@
                   "Blog",
                   6
                ]
-            ]
+            ],
+            "id" : "Luca Ferrari"
          },
          {
             "data" : [
@@ -194,47 +109,47 @@
                   2
                ]
             ],
-            "name" : "Mark Anderson",
-            "id" : "Mark Anderson"
+            "id" : "Mark Anderson",
+            "name" : "Mark Anderson"
          },
          {
-            "id" : "Marton Polgar",
             "name" : "Marton Polgar",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Marton Polgar"
          },
          {
-            "id" : "Matthew Neleigh",
             "name" : "Matthew Neleigh",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Matthew Neleigh"
          },
          {
+            "name" : "Paulo Custodio",
+            "id" : "Paulo Custodio",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "id" : "Paulo Custodio",
-            "name" : "Paulo Custodio"
+            ]
          },
          {
+            "id" : "PokGoPun",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "PokGoPun",
             "name" : "PokGoPun"
          },
          {
@@ -244,20 +159,21 @@
                   2
                ]
             ],
-            "name" : "Robert DiCicco",
-            "id" : "Robert DiCicco"
+            "id" : "Robert DiCicco",
+            "name" : "Robert DiCicco"
          },
          {
+            "name" : "Robert Ransbottom",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "id" : "Robert Ransbottom",
-            "name" : "Robert Ransbottom"
+            "id" : "Robert Ransbottom"
          },
          {
+            "name" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -268,18 +184,17 @@
                   2
                ]
             ],
-            "name" : "Roger Bell_West",
             "id" : "Roger Bell_West"
          },
          {
-            "name" : "Simon Proctor",
             "id" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Simon Proctor"
          },
          {
             "name" : "Ulrich Rieke",
@@ -296,6 +211,7 @@
             ]
          },
          {
+            "id" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -306,15 +222,122 @@
                   1
                ]
             ],
-            "name" : "W. Luis Mochan",
-            "id" : "W. Luis Mochan"
+            "name" : "W. Luis Mochan"
          }
       ]
    },
+   "legend" : {
+      "enabled" : 0
+   },
    "chart" : {
       "type" : "column"
    },
-   "legend" : {
-      "enabled" : 0
+   "title" : {
+      "text" : "The Weekly Challenge - 159"
+   },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
+   "series" : [
+      {
+         "colorByPoint" : 1,
+         "name" : "The Weekly Challenge - 159",
+         "data" : [
+            {
+               "drilldown" : "Dave Jacoby",
+               "y" : 3,
+               "name" : "Dave Jacoby"
+            },
+            {
+               "drilldown" : "E. Choroba",
+               "name" : "E. Choroba",
+               "y" : 2
+            },
+            {
+               "y" : 6,
+               "name" : "Flavio Poletti",
+               "drilldown" : "Flavio Poletti"
+            },
+            {
+               "drilldown" : "James Smith",
+               "y" : 3,
+               "name" : "James Smith"
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 5,
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "y" : 8,
+               "name" : "Luca Ferrari",
+               "drilldown" : "Luca Ferrari"
+            },
+            {
+               "name" : "Mark Anderson",
+               "y" : 2,
+               "drilldown" : "Mark Anderson"
+            },
+            {
+               "y" : 2,
+               "name" : "Marton Polgar",
+               "drilldown" : "Marton Polgar"
+            },
+            {
+               "y" : 2,
+               "name" : "Matthew Neleigh",
+               "drilldown" : "Matthew Neleigh"
+            },
+            {
+               "y" : 2,
+               "name" : "Paulo Custodio",
+               "drilldown" : "Paulo Custodio"
+            },
+            {
+               "drilldown" : "PokGoPun",
+               "y" : 2,
+               "name" : "PokGoPun"
+            },
+            {
+               "drilldown" : "Robert DiCicco",
+               "y" : 2,
+               "name" : "Robert DiCicco"
+            },
+            {
+               "drilldown" : "Robert Ransbottom",
+               "name" : "Robert Ransbottom",
+               "y" : 2
+            },
+            {
+               "name" : "Roger Bell_West",
+               "y" : 4,
+               "drilldown" : "Roger Bell_West"
+            },
+            {
+               "name" : "Simon Proctor",
+               "y" : 2,
+               "drilldown" : "Simon Proctor"
+            },
+            {
+               "drilldown" : "Ulrich Rieke",
+               "name" : "Ulrich Rieke",
+               "y" : 4
+            },
+            {
+               "drilldown" : "W. Luis Mochan",
+               "name" : "W. Luis Mochan",
+               "y" : 3
+            }
+         ]
+      }
+   ],
+   "subtitle" : {
+      "text" : "[Champions: 17] Last updated at 2022-04-07 14:14:27 GMT"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 567942436b..54bdfe9aca 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,56 +1,56 @@
 {
+   "xAxis" : {
+      "type" : "category",
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      }
+   },
    "legend" : {
       "enabled" : "false"
    },
    "chart" : {
       "type" : "column"
    },
+   "title" : {
+      "text" : "The Weekly Challenge Contributions [2019 - 2022]"
+   },
+   "subtitle" : {
+      "text" : "Last updated at 2022-04-07 14:14:26 GMT"
+   },
    "series" : [
       {
-         "dataLabels" : {
-            "enabled" : "true",
-            "y" : 10,
-            "rotation" : -90,
-            "format" : "{point.y:.0f}",
-            "align" : "right",
-            "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            },
-            "color" : "#FFFFFF"
-         },
-         "name" : "Contributions",
          "data" : [
             [
                "Blog",
-               2415
+               2416
             ],
             [
                "Perl",
-               7693
+               7695
             ],
             [
                "Raku",
-               4595
+               4597
             ]
-         ]
+         ],
+         "dataLabels" : {
+            "color" : "#FFFFFF",
+            "enabled" : "true",
+            "y" : 10,
+            "align" : "right",
+            "style" : {
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
+            },
+            "rotation" : -90,
+            "format" : "{point.y:.0f}"
+         },
+         "name" : "Contributions"
       }
    ],
-   "xAxis" : {
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      },
-      "type" : "category"
-   },
-   "title" : {
-      "text" : "The Weekly Challenge Contributions [2019 - 2022]"
-   },
-   "subtitle" : {
-      "text" : "Last updated at 2022-04-07 14:05:06 GMT"
-   },
    "yAxis" : {
       "title" : {
          "text" : null
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index eac0b4ecf0..c16db43df4 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,35 +1,838 @@
 {
+   "tooltip" : {
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
+      "followPointer" : "true",
+      "headerFormat" : "<span style=\"font-size:11px\"></span>"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
    "plotOptions" : {
       "series" : {
-         "borderWidth" : 0,
          "dataLabels" : {
             "format" : "{point.y}",
             "enabled" : 1
-         }
+         },
+         "borderWidth" : 0
       }
    },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
+   "series" : [
+      {
+         "data" : [
+            {
+               "y" : 161,
+               "name" : "#001",
+               "drilldown" : "001"
+            },
+            {
+               "drilldown" : "002",
+               "name" : "#002",
+               "y" : 125
+            },
+            {
+               "drilldown" : "003",
+               "name" : "#003",
+               "y" : 83
+            },
+            {
+               "name" : "#004",
+               "y" : 99,
+               "drilldown" : "004"
+            },
+            {
+               "y" : 78,
+               "name" : "#005",
+               "drilldown" : "005"
+            },
+            {
+               "name" : "#006",
+               "y" : 58,
+               "drilldown" : "006"
+            },
+            {
+               "drilldown" : "007",
+               "y" : 64,
+               "name" : "#007"
+            },
+            {
+               "drilldown" : "008",
+               "y" : 78,
+               "name" : "#008"
+            },
+            {
+               "drilldown" : "009",
+               "y" : 76,
+               "name" : "#009"
+            },
+            {
+               "name" : "#010",
+               "y" : 65,
+               "drilldown" : "010"
+            },
+            {
+               "drilldown" : "011",
+               "y" : 85,
+               "name" : "#011"
+            },
+            {
+               "name" : "#012",
+               "y" : 89,
+               "drilldown" : "012"
+            },
+            {
+               "drilldown" : "013",
+               "y" : 85,
+               "name" : "#013"
+            },
+            {
+               "name" : "#014",
+               "y" : 101,
+               "drilldown" : "014"
+            },
+            {
+               "y" : 99,
+               "name" : "#015",
+               "drilldown" : "015"
+            },
+            {
+               "y" : 71,
+               "name" : "#016",
+               "drilldown" : "016"
+            },
+            {
+               "drilldown" : "017",
+               "name" : "#017",
+               "y" : 84
+            },
+            {
+               "drilldown" : "018",
+               "y" : 81,
+               "name" : "#018"
+            },
+            {
+               "drilldown" : "019",
+               "name" : "#019",
+               "y" : 103
+            },
+            {
+               "y" : 101,
+               "name" : "#020",
+               "drilldown" : "020"
+            },
+            {
+               "y" : 72,
+               "name" : "#021",
+               "drilldown" : "021"
+            },
+            {
+               "name" : "#022",
+               "y" : 68,
+               "drilldown" : "022"
+            },
+            {
+               "drilldown" : "023",
+               "name" : "#023",
+               "y" : 97
+            },
+            {
+               "name" : "#024",
+               "y" : 75,
+               "drilldown" : "024"
+            },
+            {
+               "drilldown" : "025",
+               "y" : 59,
+               "name" : "#025"
+            },
+            {
+               "drilldown" : "026",
+               "y" : 74,
+               "name" : "#026"
+            },
+            {
+               "drilldown" : "027",
+               "y" : 62,
+               "name" : "#027"
+            },
+            {
+               "name" : "#028",
+               "y" : 82,
+               "drilldown" : "028"
+            },
+            {
+               "drilldown" : "029",
+               "y" : 81,
+               "name" : "#029"
+            },
+            {
+               "drilldown" : "030",
+               "y" : 119,
+               "name" : "#030"
+            },
+            {
+               "y" : 91,
+               "name" : "#031",
+               "drilldown" : "031"
+            },
+            {
+               "drilldown" : "032",
+               "y" : 96,
+               "name" : "#032"
+            },
+            {
+               "y" : 112,
+               "name" : "#033",
+               "drilldown" : "033"
+            },
+            {
+               "drilldown" : "034",
+               "name" : "#034",
+               "y" : 66
+            },
+            {
+               "drilldown" : "035",
+               "name" : "#035",
+               "y" : 66
+            },
+            {
+               "name" : "#036",
+               "y" : 70,
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