- Added solutions by Luca Ferrari.

14 files changed, 1137 insertions, 953 deletions

diff --git a/challenge-044/luca-ferrari/README b/challenge-044/luca-ferrari/README
new file mode 100644
index 0000000000..36518848d1
--- /dev/null
+++ b/challenge-044/luca-ferrari/README
@@ -0,0 +1 @@
+Solutions by Luca Ferrari.
diff --git a/challenge-044/luca-ferrari/raku/ch-1.p6 b/challenge-044/luca-ferrari/raku/ch-1.p6
new file mode 100644
index 0000000000..54defcef42
--- /dev/null
+++ b/challenge-044/luca-ferrari/raku/ch-1.p6
@@ -0,0 +1,42 @@
+#!env perl6
+
+# Perl Weekly Challenge 44
+# Task 1
+# You are given a string “123456789”.
+# Write a script that would insert ”+” or ”-” in between
+# digits so that when you evaluate, the result should be 100.
+#
+# See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-044/>
+
+my $string    = '123456789';
+my @digits    = $string.comb;
+my @operators = [ ' + ', ' - ', '' ] xx @digits.elems;
+
+
+
+# produce a set of strings by combining all possible operators
+# into all possible digits.
+# Explaination:
+# @digits Z @operators creates a list of elements
+# with all the digits and applicable signs, something like (1 [+ - ]) (2 [+ - ])
+#
+# then the slip flattens the list and remap it to another list
+#
+# then the hyperoperator concatenates everything as a single string
+#
+# In the loop the spaces are removed, then the string is split by the sign
+# and the .Int method computes the value of every part.
+for [X~] map { .Slip },  (@digits Z @operators) {
+
+    # remove extra spaces
+    my $expression = .Str.subst( ' ', '', :g );
+
+    my $sum = 0;
+    for $expression ~~ m:g/ (<[- + ]>\d+)/ {
+        $sum += .Int;
+    }
+
+
+    say "Expression [$expression] = $sum" if $sum == 100;
+
+}
diff --git a/challenge-044/luca-ferrari/raku/ch-2.p6 b/challenge-044/luca-ferrari/raku/ch-2.p6
new file mode 100644
index 0000000000..fb597b6cbb
--- /dev/null
+++ b/challenge-044/luca-ferrari/raku/ch-2.p6
@@ -0,0 +1,55 @@
+#!env perl6
+
+# Perl Weekly Challenge 44
+# Task 2
+# You have only $1 left at the start of the week.
+# You have been given an opportunity to make it $200. The rule is simple with every move you can either double what
+# you have or add another $1. Write a script to help you get $200 with the smallest number of moves.
+# See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-044/>
+#
+# Start with one buck,
+#   then double to get 2 $,
+#   then add one buck to get 3 $,
+#   then double to get 6 $,
+#   then double to get 12 $,
+#   then double to get 24 $,
+#   then add one buck to get 25 $,
+#   then double to get 50 $,
+#   then double to get 100 $,
+#   then double to get 200 $
+# You need 9 operations to get from 1 $ to 200 $!
+
+
+my $initial-value = 1;
+my $final-value   = 200;
+
+
+sub MAIN( Int :$final-value = 200,
+          Int :$initial-value = 1 ){
+    my $current-val = $final-value;
+    my @moves;
+
+    while ( $current-val > $initial-value ) {
+
+        @moves.unshift: '%s to get %d $'
+                            .sprintf( $current-val %% 2 ?? 'double' !! 'add one buck', $current-val );
+        $current-val = $current-val %% 2 ?? $current-val / 2 !! $current-val - 1;
+
+        # given  $current-val %% 2 {
+        #     when .so {
+        #         @moves.unshift: 'double to get %d $'.sprintf( $current-val );
+        #         $current-val /= 2;
+        #     }
+        #     when ! .so {
+        #         @moves.unshift: 'add one buck to get %d $'.sprintf( $current-val );
+        #         $current-val -= 1;
+        #     }
+        # };
+    }
+
+    @moves.unshift: 'Start with one buck';
+    @moves.join( ",\n then ").say;
+    'You need %d operations to get from %d $ to %d $!'.sprintf( @moves.elems - 1, $initial-value, $final-value ).say;
+
+}
+
diff --git a/stats/pwc-challenge-043.json b/stats/pwc-challenge-043.json
new file mode 100644
index 0000000000..e26bbb7183
--- /dev/null
+++ b/stats/pwc-challenge-043.json
@@ -0,0 +1,423 @@
+{
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         },
+         "borderWidth" : 0
+      }
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge - 043"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
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+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>"
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+               "drilldown" : "Adam Russell",
+               "y" : 3,
+               "name" : "Adam Russell"
+            },
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+               "name" : "Alicia Bielsa",
+               "drilldown" : "Alicia Bielsa",
+               "y" : 1
+            },
+            {
+               "drilldown" : "Andrezgz",
+               "y" : 2,
+               "name" : "Andrezgz"
+            },
+            {
+               "name" : "Arne Sommer",
+               "y" : 3,
+               "drilldown" : "Arne Sommer"
+            },
+            {
+               "name" : "Burkhard Nickels",
+               "drilldown" : "Burkhard Nickels",
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+            },
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+               "name" : "Colin Crain",
+               "drilldown" : "Colin Crain",
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+               "drilldown" : "Cristina Heredia",
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+               "name" : "Dave Jacoby",
+               "drilldown" : "Dave Jacoby",
+               "y" : 3
+            },
+            {
+               "name" : "Duane Powell",
+               "y" : 2,
+               "drilldown" : "Duane Powell"
+            },
+            {
+               "name" : "E. Choroba",
+               "y" : 3,
+               "drilldown" : "E. Choroba"
+            },
+            {
+               "y" : 5,
+               "drilldown" : "Jaldhar H. Vyas",
+               "name" : "Jaldhar H. Vyas"
+            },
+            {
+               "name" : "Javier Luque",
+               "y" : 5,
+               "drilldown" : "Javier Luque"
+            },
+            {
+               "y" : 5,
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari"
+            },
+            {
+               "name" : "Markus Holzer",
+               "y" : 2,
+               "drilldown" : "Markus Holzer"
+            },
+            {
+               "drilldown" : "Roger Bell West",
+               "y" : 4,
+               "name" : "Roger Bell West"
+            },
+            {
+               "name" : "Ruben Westerberg",
+               "y" : 4,
+               "drilldown" : "Ruben Westerberg"
+            },
+            {
+               "drilldown" : "Ryan Thompson",
+               "y" : 6,
+               "name" : "Ryan Thompson"
+            },
+            {
+               "name" : "Saif Ahmed",
+               "y" : 2,
+               "drilldown" : "Saif Ahmed"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Simon Proctor",
+               "name" : "Simon Proctor"
+            },
+            {
+               "name" : "Wanderdoc",
+               "y" : 2,
+               "drilldown" : "Wanderdoc"
+            }
+         ],
+         "colorByPoint" : 1,
+         "name" : "Perl Weekly Challenge - 043"
+      }
+   ],
+   "subtitle" : {
+      "text" : "[Champions: 21] Last updated at 2020-01-20 17:11:23 GMT"
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "drilldown" : {
+      "series" : [
+         {
+            "id" : "Adam Russell",
+            "name" : "Adam Russell",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  1
+               ]
+            ],
+            "name" : "Alicia Bielsa",
+            "id" : "Alicia Bielsa"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Andrezgz",
+            "id" : "Andrezgz"
+         },
+         {
+            "name" : "Arne Sommer",
+            "id" : "Arne Sommer",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "name" : "Burkhard Nickels",
+            "id" : "Burkhard Nickels",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "Colin Crain",
+            "name" : "Colin Crain",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "Cristina Heredia",
+            "name" : "Cristina Heredia",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby"
+         },
+         {
+            "name" : "Duane Powell",
+            "id" : "Duane Powell",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "E. Choroba",
+            "name" : "E. Choroba",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Jaldhar H. Vyas",
+            "id" : "Jaldhar H. Vyas"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Javier Luque",
+            "name" : "Javier Luque"
+         },
+         {
+            "name" : "Laurent Rosenfeld",
+            "id" : "Laurent Rosenfeld",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "Markus Holzer",
+            "id" : "Markus Holzer"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Roger Bell West",
+            "name" : "Roger Bell West"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Ruben Westerberg",
+            "name" : "Ruben Westerberg"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "name" : "Ryan Thompson",
+            "id" : "Ryan Thompson"
+         },
+         {
+            "id" : "Saif Ahmed",
+            "name" : "Saif Ahmed",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "Simon Proctor",
+            "name" : "Simon Proctor",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Wanderdoc",
+            "name" : "Wanderdoc"
+         }
+      ]
+   }
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index e8ce10c980..17500ee0d1 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,423 +1,63 @@
 {
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge - 044"
+   },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
-   "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
-   },
-   "subtitle" : {
-      "text" : "[Champions: 21] Last updated at 2020-01-20 16:52:39 GMT"
-   },
-   "legend" : {
-      "enabled" : 0
-   },
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       "type" : "category"
    },
+   "chart" : {
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+   },
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+   },
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+         "name" : "Perl Weekly Challenge - 044",
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-               "drilldown" : "Adam Russell"
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-            },
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-               "name" : "Dave Jacoby"
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-               "name" : "E. Choroba",
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-               "name" : "Jaldhar H. Vyas",
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-               "drilldown" : "Javier Luque"
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-               "name" : "Laurent Rosenfeld"
-            },
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-               "y" : 2,
-               "drilldown" : "Luca Ferrari"
-            },
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-               "name" : "Roger Bell West"
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-               "drilldown" : "Ruben Westerberg"
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-               "drilldown" : "Ryan Thompson"
-            },
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-               "y" : 2,
-               "drilldown" : "Saif Ahmed"
-            },
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-               "name" : "Simon Proctor"
-            },
-            {
                "y" : 2,
-               "name" : "Wanderdoc",
-               "drilldown" : "Wanderdoc"
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari"
             }
-         ]
+         ],
+         "colorByPoint" : 1
       }
    ],
-   "title" : {
-      "text" : "Perl Weekly Challenge - 043"
-   },
-   "chart" : {
-      "type" : "column"
+   "subtitle" : {
+      "text" : "[Champions: 1] Last updated at 2020-01-20 17:11:23 GMT"
    },
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-                  2
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-            "name" : "Duane Powell"
-         },
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-            "name" : "E. Choroba",
-            "data" : [
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-                  "Perl",
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-               [
-                  "Blog",
-                  1
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-                  "Perl",
-                  2
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-               [
-                  "Raku",
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-                  "Blog",
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-            "name" : "Jaldhar H. Vyas",
-            "id" : "Jaldhar H. Vyas"
-         },
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-            "id" : "Javier Luque",
-            "name" : "Javier Luque",
-            "data" : [
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-                  "Perl",
-                  2
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-                  "Raku",
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-                  "Blog",
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-            "id" : "Laurent Rosenfeld",
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                   2
                ]
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             "id" : "Luca Ferrari",
             "name" : "Luca Ferrari"
-         },
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-            "id" : "Markus Holzer",
-            "name" : "Markus Holzer",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ]
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "name" : "Roger Bell West",
-            "id" : "Roger Bell West"
-         },
-         {
-            "name" : "Ruben Westerberg",
-            "id" : "Ruben Westerberg",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ]
-            ]
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  2
-               ]
-            ],
-            "name" : "Ryan Thompson",
-            "id" : "Ryan Thompson"
-         },
-         {
-            "name" : "Saif Ahmed",
-            "id" : "Saif Ahmed",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ]
-         },
-         {
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "name" : "Simon Proctor",
-            "id" : "Simon Proctor"
-         },
-         {
-            "name" : "Wanderdoc",
-            "id" : "Wanderdoc",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ]
          }
       ]
    },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         },
-         "borderWidth" : 0
-      }
+   "legend" : {
+      "enabled" : 0
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index ef615c9bf4..fbfd39a646 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,12 +1,39 @@
 {
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   },
+   "xAxis" : {
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      },
+      "type" : "category"
+   },
    "chart" : {
       "type" : "column"
    },
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   "yAxis" : {
+      "title" : {
+         "text" : null
+      },
+      "min" : 0
    },
    "series" : [
       {
+         "dataLabels" : {
+            "rotation" : -90,
+            "style" : {
+               "fontFamily" : "Verdana, sans-serif",
+               "fontSize" : "13px"
+            },
+            "color" : "#FFFFFF",
+            "align" : "right",
+            "enabled" : "true",
+            "format" : "{point.y:.0f}",
+            "y" : 10
+         },
          "data" : [
             [
                "Blog",
@@ -18,46 +45,19 @@
             ],
             [
                "Raku",
-               1070
+               1072
             ]
          ],
-         "dataLabels" : {
-            "color" : "#FFFFFF",
-            "enabled" : "true",
-            "rotation" : -90,
-            "y" : 10,
-            "format" : "{point.y:.0f}",
-            "align" : "right",
-            "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            }
-         },
          "name" : "Contributions"
       }
    ],
-   "xAxis" : {
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      },
-      "type" : "category"
-   },
    "subtitle" : {
-      "text" : "Last updated at 2020-01-20 16:52:39 GMT"
-   },
-   "legend" : {
-      "enabled" : "false"
+      "text" : "Last updated at 2020-01-20 17:11:23 GMT"
    },
    "tooltip" : {
       "pointFormat" : "<b>{point.y:.0f}</b>"
    },
-   "yAxis" : {
-      "title" : {
-         "text" : null
-      },
-      "min" : 0
+   "legend" : {
+      "enabled" : "false"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index cfe6a009c6..4ea80de3f7 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,