- Added solutions by Javier Luque.

16 files changed, 1230 insertions, 912 deletions

diff --git a/challenge-057/javier-luque/blog.txt b/challenge-057/javier-luque/blog.txt
new file mode 100644
index 0000000000..cd22ffe8dc
--- /dev/null
+++ b/challenge-057/javier-luque/blog.txt
@@ -0,0 +1 @@
+https://perlchallenges.wordpress.com/2020/04/20/perl-weekly-challenge-057/
diff --git a/challenge-057/javier-luque/perl/ch-1.pl b/challenge-057/javier-luque/perl/ch-1.pl
new file mode 100644
index 0000000000..7d3fdfe7fc
--- /dev/null
+++ b/challenge-057/javier-luque/perl/ch-1.pl
@@ -0,0 +1,135 @@
+#!/usr/bin/perl
+# Test: ./ch-1.pl 4
+package BTree::Node; # Binary Tree
+
+use strict;
+use warnings;
+use Mouse;
+
+has 'value' => (
+    is  => 'rw',
+    isa => 'Maybe[Str]',
+    default => sub { return undef; }
+);
+
+has 'left' => (
+    is  => 'rw',
+    isa => 'Maybe[BTree::Node]',
+    default => sub { return undef }
+);
+
+has 'right' => (
+    is  => 'rw',
+    isa => 'Maybe[ BTree::Node]',
+    default => sub { return undef }
+);
+
+__PACKAGE__->meta->make_immutable();
+
+package BTree; # Binary Tree
+
+use strict;
+use warnings;
+use Mouse;
+use feature qw /say/;
+
+has 'root' => (
+    is  => 'rw',
+    isa => 'BTree::Node',
+    default => sub { BTree::Node->new() }
+);
+
+# Creates the Binary tree from the data
+sub create_btree {
+    my ($self, $data, $node) = @_;
+
+    $node = $self->root
+    	unless($node);
+
+    # End of the line
+    if (ref $data ne 'ARRAY') {
+    	$node->value($data);
+    	return;
+    }
+
+    # Value is contained in the first item of the list
+    $node->value($data->[0]);
+
+    # Left branch
+    if ($data->[1]->[0]) {
+    	$node->left( BTree::Node->new() );
+    	$self->create_btree($data->[1]->[0], $node->left );
+    }
+
+    # Right branch
+    if ($data->[1]->[1]) {
+    	$node->right( BTree::Node->new() );
+    	$self->create_btree($data->[1]->[1], $node->right );
+    }
+}
+
+# Print the tree
+sub print_tree {
+    my ($self, $node) = @_;
+
+    $node = $self->root
+    	unless($node);
+
+    my $left = ($node->left) ?
+    	$self->print_tree($node->left) :
+    	undef;
+
+    my $right = ($node->right) ?
+    	$self->print_tree($node->right) :
+    	undef;
+
+    my $lists = ($left || $right) ?
+    	          ' => ' . "[ $left, $right ]" :
+    	          '';
+
+    return $node->value . $lists;
+}
+
+# Invert the tree
+sub invert_tree {
+    my ($self, $node) = @_;
+
+    $node = $self->root
+    	unless($node);
+
+    # Branch left
+    $self->invert_tree( $node->left )
+    	if ($node->left);
+
+    # Branch right
+    $self->invert_tree( $node->right )
+    	if ($node->right);
+
+    # Invert the tree
+    my $temp = $node->left;
+    $node->left($node->right);
+    $node->right($temp);
+
+}
+
+__PACKAGE__->meta->make_immutable();
+
+package main;
+
+use strict;
+use warnings;
+use feature qw /say/;
+
+my $btree_data = [
+    1 => [
+    	[ 2 => [4 , 5] ],
+    	[ 3 => [6 , 7] ],
+    ]
+];
+my $btree = BTree->new();
+my $node = $btree->root;
+
+$btree->create_btree($btree_data);
+say "Original: " . $btree->print_tree();
+$btree->invert_tree();
+say "Inverted: " . $btree->print_tree();
diff --git a/challenge-057/javier-luque/perl/ch-2.pl b/challenge-057/javier-luque/perl/ch-2.pl
new file mode 100644
index 0000000000..663895e85b
--- /dev/null
+++ b/challenge-057/javier-luque/perl/ch-2.pl
@@ -0,0 +1,35 @@
+#!/usr/bin/perl
+# Test: ./ch-2.pl
+
+use strict;
+use warnings;
+use feature qw /say/;
+use Tree::Trie;
+
+my @words = qw[
+    alphabet  book    carpet
+    cadmium   cadeau  alpine
+];
+my $trie = Tree::Trie->new;
+$trie->add(@words);
+
+# Find each answer
+my @answers;
+for my $word (@words) {
+    my @letters = split('', $word);
+    my $search_word = '';
+
+    for my $letter (@letters) {
+    	$search_word .= $letter;
+    	my @counts = $trie->lookup($search_word);
+
+    	# If there is only one word left,
+    	# we are unique
+    	if (scalar(@counts) == 1) {
+    		push @answers, $search_word;
+    		last;
+    	}
+    }
+}
+
+say join ', ', @answers;
diff --git a/challenge-057/javier-luque/raku/ch-1.p6 b/challenge-057/javier-luque/raku/ch-1.p6
new file mode 100644
index 0000000000..7c59eb819b
--- /dev/null
+++ b/challenge-057/javier-luque/raku/ch-1.p6
@@ -0,0 +1,89 @@
+# Test: perl6 ch-2.p6 4
+class BTree {
+
+    my class Node {
+    	has Int $.value is rw;
+    	has Node $.left is rw;
+    	has Node $.right is rw;
+    };
+
+    has Node $.root is rw;
+
+    # Create the binary trees
+    multi method create-btree($data) {
+    	self.root = Node.new;
+    	self.create-btree($data, self.root)
+    }
+
+    multi method create-btree($data, Node $node) {
+    	$node.value = $data.[0];
+
+    	# Left branch
+    	if ($data.[1].[0]) {
+    		$node.left = Node.new();
+    		self.create-btree($data.[1].[0], $node.left);
+    	}
+
+    	# Right branch
+    	if ($data.[1].[1]) {
+    		$node.right = Node.new();
+    		self.create-btree($data.[1].[1], $node.right);
+    	}
+    }
+
+    # Print the tree
+    multi method print-tree() {
+    	self.print-tree(self.root);
+    }
+
+    multi method print-tree(Node $node) {
+    	my $left = ($node.left) ??
+    		self.print-tree($node.left) !!
+    		Nil;
+
+    	my $right = ($node.right) ??
+    		self.print-tree($node.right) !!
+    		Nil;
+
+    	my $lists = ($left || $right) ??
+    	            ' => ' ~ "[ $left, $right ]" !!
+    	            '';
+
+    	return $node.value ~ $lists;
+    }
+
+    # Invert the tree
+    multi method invert-tree() {
+    	self.invert-tree(self.root);
+    }
+
+    multi method invert-tree(Node $node) {
+    	# Branch left
+    	self.invert-tree( $node.left )
+    		if ($node.left);
+
+    	# Branch right
+    	self.invert-tree( $node.right )
+    		if ($node.right);
+
+    	# Invert
+    	my $temp = $node.left;
+    	$node.left = $node.right;
+    	$node.right = $temp;
+    }
+}
+
+# Main program
+sub MAIN() {
+    my $btree_data = [
+    	1 , [
+    		[ 2 , [4 , 5] ],
+    		[ 3 , [6 , 7] ],
+    	]
+    ];
+    my $btree = BTree.new();
+    $btree.create-btree($btree_data);
+    say 'Original: ' ~  $btree.print-tree;
+    $btree.invert-tree();
+    say 'Inverted: ' ~ $btree.print-tree;
+}
diff --git a/challenge-057/javier-luque/raku/ch-2.p6 b/challenge-057/javier-luque/raku/ch-2.p6
new file mode 100644
index 0000000000..ba7b3f299d
--- /dev/null
+++ b/challenge-057/javier-luque/raku/ch-2.p6
@@ -0,0 +1,35 @@
+# Test: perl6 ch-2.p6 4
+use Concurrent::Trie;
+
+sub MAIN() {
+    my $trie = Concurrent::Trie.new;
+    my @words = qw[
+    	alphabet  book    carpet
+    	cadmium   cadeau  alpine
+    ];
+
+    # Insert each word
+    for (@words) -> $word {
+    	$trie.insert($word)
+    }
+
+    # Find each answer
+    my @answers;
+    for (@words) -> $word {
+    	my $search_word = '';
+
+    	for ($word.comb) -> $letter {
+    		$search_word ~= $letter;
+    		my @counts = $trie.entries($search_word);
+
+    		# If there is only one word left,
+    		# we are unique
+    		if (@counts.elems == 1) {
+    			@answers.push($search_word);
+    			last;
+    		}
+    	}
+    }
+
+    say @answers.perl;
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index dc2ee29dd4..6df83ff90e 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,12 +1,60 @@
 {
-   "xAxis" : {
-      "type" : "category"
-   },
-   "chart" : {
-      "type" : "column"
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
    },
-   "subtitle" : {
-      "text" : "[Champions: 6] Last updated at 2020-04-20 15:34:51 GMT"
+   "series" : [
+      {
+         "name" : "Perl Weekly Challenge - 057",
+         "data" : [
+            {
+               "drilldown" : "Javier Luque",
+               "y" : 5,
+               "name" : "Javier Luque"
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "y" : 4,
+               "name" : "Luca Ferrari"
+            },
+            {
+               "drilldown" : "Markus Holzer",
+               "y" : 1,
+               "name" : "Markus Holzer"
+            },
+            {
+               "drilldown" : "Pete Houston",
+               "y" : 1,
+               "name" : "Pete Houston"
+            },
+            {
+               "drilldown" : "Roger Bell West",
+               "name" : "Roger Bell West",
+               "y" : 2
+            },
+            {
+               "name" : "Simon Proctor",
+               "y" : 2,
+               "drilldown" : "Simon Proctor"
+            },
+            {
+               "y" : 2,
+               "name" : "Yet Ebreo",
+               "drilldown" : "Yet Ebreo"
+            }
+         ],
+         "colorByPoint" : 1
+      }
+   ],
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         },
+         "borderWidth" : 0
+      }
    },
    "title" : {
       "text" : "Perl Weekly Challenge - 057"
@@ -14,7 +62,24 @@
    "drilldown" : {
       "series" : [
          {
-            "name" : "Luca Ferrari",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Javier Luque",
+            "id" : "Javier Luque"
+         },
+         {
             "data" : [
                [
                   "Raku",
@@ -25,37 +90,38 @@
                   2
                ]
             ],
+            "name" : "Luca Ferrari",
             "id" : "Luca Ferrari"
          },
          {
+            "id" : "Markus Holzer",
             "data" : [
                [
                   "Raku",
                   1
                ]
             ],
-            "id" : "Markus Holzer",
             "name" : "Markus Holzer"
          },
          {
+            "name" : "Pete Houston",
             "data" : [
                [
                   "Perl",
                   1
                ]
             ],
-            "id" : "Pete Houston",
-            "name" : "Pete Houston"
+            "id" : "Pete Houston"
          },
          {
-            "name" : "Roger Bell West",
-            "id" : "Roger Bell West",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Roger Bell West",
+            "id" : "Roger Bell West"
          },
          {
             "name" : "Simon Proctor",
@@ -74,69 +140,26 @@
                   2
                ]
             ],
-            "id" : "Yet Ebreo",
-            "name" : "Yet Ebreo"
+            "name" : "Yet Ebreo",
+            "id" : "Yet Ebreo"
          }
       ]
    },
    "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
+      "followPointer" : 1,
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>"
    },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
+   "subtitle" : {
+      "text" : "[Champions: 7] Last updated at 2020-04-20 20:28:41 GMT"
    },
-   "legend" : {
-      "enabled" : 0
+   "chart" : {
+      "type" : "column"
    },
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         }
-      }
+   "xAxis" : {
+      "type" : "category"
    },
-   "series" : [
-      {
-         "data" : [
-            {
-               "name" : "Luca Ferrari",
-               "drilldown" : "Luca Ferrari",
-               "y" : 4
-            },
-            {
-               "name" : "Markus Holzer",
-               "drilldown" : "Markus Holzer",
-               "y" : 1
-            },
-            {
-               "y" : 1,
-               "name" : "Pete Houston",
-               "drilldown" : "Pete Houston"
-            },
-            {
-               "name" : "Roger Bell West",
-               "drilldown" : "Roger Bell West",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Simon Proctor",
-               "name" : "Simon Proctor",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Yet Ebreo",
-               "name" : "Yet Ebreo",
-               "y" : 2
-            }
-         ],
-         "name" : "Perl Weekly Challenge - 057",
-         "colorByPoint" : 1
-      }
-   ]
+   "legend" : {
+      "enabled" : 0
+   }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 81217787a3..de7fca64fe 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,63 +1,63 @@
 {
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   },
+   "yAxis" : {
+      "min" : 0,
+      "title" : {
+         "text" : null
+      }
+   },
    "series" : [
       {
+         "dataLabels" : {
+            "color" : "#FFFFFF",
+            "align" : "right",
+            "style" : {
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
+            },
+            "format" : "{point.y:.0f}",
+            "enabled" : "true",
+            "y" : 10,
+            "rotation" : -90
+         },
          "data" : [
             [
                "Blog",
-               628
+               629
             ],
             [
                "Perl",
-               2391
+               2393
             ],
             [
                "Raku",
-               1497
+               1499
             ]
          ],
-         "name" : "Contributions",
-         "dataLabels" : {
-            "enabled" : "true",
-            "rotation" : -90,
-            "align" : "right",
-            "y" : 10,
-            "format" : "{point.y:.0f}",
-            "color" : "#FFFFFF",
-            "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            }
-         }
+         "name" : "Contributions"
       }
    ],
-   "yAxis" : {
-      "min" : 0,
-      "title" : {
-         "text" : null
-      }
-   },
-   "legend" : {
-      "enabled" : "false"
-   },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
-   },
    "subtitle" : {
-      "text" : "Last updated at 2020-04-20 15:34:51 GMT"
+      "text" : "Last updated at 2020-04-20 20:28:41 GMT"
    },
    "chart" : {
       "type" : "column"
    },
+   "legend" : {
+      "enabled" : "false"
+   },
    "xAxis" : {
+      "type" : "category",
       "labels" : {
          "style" : {
-            "fontFamily" : "Verdana, sans-serif",
-            "fontSize" : "13px"
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
          }
-      },
-      "type" : "category"
+      }
+   },
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index a9665687c8..3bc5bed2f7 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,20 +1,336 @@
 {
-   "xAxis" : {
-      "type" : "category"
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge Language"
+   },
+   "series" : [
+      {
+         "data" : [
+            {
+               "drilldown" : "001",
+               "y" : 140,
+               "name" : "#001"
+            },
+            {
+               "drilldown" : "002",
+               "y" : 109,
+               "name" : "#002"
+            },
+            {
+               "drilldown" : "003",
+               "name" : "#003",
+               "y" : 71
+            },
+            {
+               "y" : 91,
+               "name" : "#004",
+               "drilldown" : "004"
+            },
+            {
+               "drilldown" : "005",
+               "name" : "#005",
+               "y" : 71
+            },
+            {
+               "name" : "#006",
+               "y" : 52,
+               "drilldown" : "006"
+            },
+            {
+               "name" : "#007",
+               "y" : 58,
+               "drilldown" : "007"
+            },
+            {
+               "name" : "#008",
+               "y" : 70,
+               "drilldown" : "008"
+            },
+            {
+               "drilldown" : "009",
+               "name" : "#009",
+               "y" : 68
+            },
+            {
+               "drilldown" : "010",
+               "y" : 60,
+               "name" : "#010"
+            },
+            {
+               "drilldown" : "011",
+               "y" : 79,
+               "name" : "#011"
+            },
+            {
+               "drilldown" : "012",
+               "y" : 83,
+               "name" : "#012"
+            },
+            {
+               "name" : "#013",
+               "y" : 76,
+               "drilldown" : "013"
+            },
+            {
+               "name" : "#014",
+               "y" : 96,
+               "drilldown" : "014"
+            },
+            {
+               "drilldown" : "015",
+               "y" : 93,
+               "name" : "#015"
+            },
+            {
+               "drilldown" : "016",
+               "name" : "#016",
+               "y" : 66
+            },
+            {
+               "drilldown" : "017",
+               "y" : 79,
+               "name" : "#017"
+            },
+            {
+               "y" : 76,
+               "name" : "#018",
+               "drilldown" : "018"
+            },
+            {
+               "name" : "#019",
+               "y" : 97,
+               "drilldown" : "019"
+            },
+            {
+               "drilldown" : "020",
+               "y" : 95,
+               "name" : "#020"
+            },
+            {
+               "name" : "#021",
+               "y" : 67,
+               "drilldown" : "021"
+            },
+            {
+               "y" : 63,
+               "name" : "#022",
+               "drilldown" : "022"
+            },
+            {
+               "y" : 91,
+               "name" : "#023",
+               "drilldown" : "023"
+            },
+            {
+               "name" : "#024",
+               "y" : 70,
+               "drilldown" : "024"
+            },
+            {
+               "drilldown" : "025",
+               "y" : 55,
+               "name" : "#025"
+            },
+            {
+               "y" : 70,
+               "name" : "#026",
+               "drilldown" : "026"
+            },
+            {
+               "drilldown" : "027",
+               "y" : 58,
+               "name" : "#027"
+            },
+            {
+               "drilldown" : "028",
+               "y" : 78,
+               "name" : "#028"
+            },
+            {
+               "drilldown" : "029",
+               "y" : 77,
+               "name" : "#029"
+            },
+            {
+               "name" : "#030",
+               "y" : 115,
+               "drilldown" : "030"
+            },
+            {
+               "drilldown" : "031",
+               "name" : "#031",
+               "y" : 87
+            },
+            {
+               "drilldown" : "032",
+               "y" : 92,
+               "name" : "#032"
+            },
+            {
+               "drilldown" : "033",
+               "name" : "#033",
+               "y" : 108
+            },
+            {
+               "drilldown" : "034",
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+            },
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+               "name" : "#035",
+               "drilldown" : "035"
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+               "name" : "#036"
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+               "name" : "#037"
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+               "drilldown" : "038",
+               "name" : "#038",
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+            },
+            {
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+               "y" : 60,
+               "drilldown" : "039"
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+               "y" : 71,
+               "drilldown" : "040"
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+            {
+               "drilldown" : "041",
+               "y" : 74,
+               "name" : "#041"
+            },
+            {
+               "y" : 88,
+               "name" : "#042",
+               "drilldown" : "042"
+            },
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+               "drilldown" : "043",
+               "y" : 65,
+               "name" : "#043"
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+               "drilldown" : "044",
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+            },
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+               "name" : "#045",
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+            },
+            {
+               "name" : "#046",
+               "y" : 83,
+               "drilldown" : "046"
+            },
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+               "drilldown" : "047"
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+               "name" : "#048",
+               "drilldown" : "048"
+            },
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+               "y" : 85,
+               "name" : "#049"
+            },
+            {
+               "name" : "#050",
+               "y" : 96,
+               "drilldown" : "050"
+            },
+            {
+               "drilldown" : "051",
+               "y" : 87,
+               "name" : "#051"
+            },
+            {
+               "name" : "#052",
+               "y" : 89,
+               "drilldown" : "052"
+            },
+            {
+               "drilldown" : "053",
+               "name" : "#053",
+               "y" : 99
+            },
+            {
+               "y" : 95,
+               "name" : "#054",
+               "drilldown" : "054"
+            },
+            {
+               "y" : 85,
+               "name" : "#055",
+               "drilldown" : "055"
+            },
+            {
+               "y" : 86,
+               "name" : "#056",
+               "drilldown" : "056"
+            },
+            {
+               "name" : "#057",
+               "y" : 17,
+               "drilldown" : "057"
+            }
+         ],
+         "name" : "Perl Weekly Challenge Languages",
+         "colorByPoint" : "true"
+      }
+   ],
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
    },
    "chart" : {
       "type" : "column"
    },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
    "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-04-20 15:34:51 GMT"
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-04-20 20:28:41 GMT"
    },
-   "title" : {
-      "text" : "Perl Weekly Challenge Language"
+   "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>"
    },
    "drilldown" : {
       "series" : [
          {
             "id" : "001",
+            "name" : "001",
             "data" : [
                [
                   "Perl",
@@ -28,8 +344,7 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "001"
+            ]
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             "id" : "002",
@@ -50,6 +365,7 @@
             "name" : "002"
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                   "Perl",
@@ -64,10 +380,10 @@
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                ]
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-            "id" : "003",
-            "name" : "003"
+            "id" : "003"
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                   "Perl",
@@ -82,7 +398,6 @@
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@@ -104,7 +419,7 @@
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@@ -119,10 +434,10 @@
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@@ -137,10 +452,10 @@
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                   "Perl",
@@ -155,7 +470,7 @@
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@@ -172,11 +487,10 @@
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@@ -191,7 +505,8 @@
                   "Blog",
                   11
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