- Added solutions by Shahed Nooshmand.

14 files changed, 1341 insertions, 1299 deletions

diff --git a/challenge-056/shahed-nooshmand/blog.txt b/challenge-056/shahed-nooshmand/blog.txt
new file mode 100644
index 0000000000..3270bd30c6
--- /dev/null
+++ b/challenge-056/shahed-nooshmand/blog.txt
@@ -0,0 +1 @@
+https://rafraichisso.ir/2020/04/18/pwc-56
diff --git a/challenge-056/shahed-nooshmand/raku/ch-1.p6 b/challenge-056/shahed-nooshmand/raku/ch-1.p6
new file mode 100644
index 0000000000..f102eba090
--- /dev/null
+++ b/challenge-056/shahed-nooshmand/raku/ch-1.p6
@@ -0,0 +1,9 @@
+#!/usr/bin/env raku
+
+my @N = 2, 7, 9;
+my $k = 2;
+
+for ^@N -> $i {
+    my $j = (@N[$i] + $k) 🔎 @N[$i+1..*];
+    say $i, " ", 1 + $i + $j with $j
+}
diff --git a/challenge-056/shahed-nooshmand/raku/ch-2.p6 b/challenge-056/shahed-nooshmand/raku/ch-2.p6
new file mode 100644
index 0000000000..6fa4649ec1
--- /dev/null
+++ b/challenge-056/shahed-nooshmand/raku/ch-2.p6
@@ -0,0 +1,13 @@
+#!/usr/bin/env raku
+
+multi paths(Pair $tree) {
+    |paths($tree.value).map: {$tree.key, |$_}
+}
+multi paths(Positional $nodes) {
+    $nodes.map: { paths $_ }
+}
+multi paths($leaf) { $leaf }
+
+my $tree = 5 => (4 => 11 => (7, 2),
+                 8 => (9 => 1, 13));
+say %(paths($tree).map: {.sum => $_}){22}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 96bc146298..a1b52aefad 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,42 +1,39 @@
 {
-   "subtitle" : {
-      "text" : "[Champions: 20] Last updated at 2020-04-19 09:53:38 GMT"
-   },
    "chart" : {
       "type" : "column"
    },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
-      }
+   "xAxis" : {
+      "type" : "category"
+   },
+   "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/>"
    },
    "drilldown" : {
       "series" : [
          {
-            "name" : "Alicia Bielsa",
             "id" : "Alicia Bielsa",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Alicia Bielsa"
          },
          {
+            "name" : "Andrezgz",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Andrezgz",
             "id" : "Andrezgz"
          },
          {
+            "id" : "Arne Sommer",
             "data" : [
                [
                   "Raku",
@@ -47,30 +44,30 @@
                   1
                ]
             ],
-            "name" : "Arne Sommer",
-            "id" : "Arne Sommer"
+            "name" : "Arne Sommer"
          },
          {
             "id" : "Cheok-Yin Fung",
-            "name" : "Cheok-Yin Fung",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "name" : "Cheok-Yin Fung"
          },
          {
-            "name" : "Cristina Heredia",
             "id" : "Cristina Heredia",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "name" : "Cristina Heredia"
          },
          {
+            "id" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -81,7 +78,6 @@
                   1
                ]
             ],
-            "id" : "Dave Jacoby",
             "name" : "Dave Jacoby"
          },
          {
@@ -95,8 +91,6 @@
             ]
          },
          {
-            "id" : "Jared Martin",
-            "name" : "Jared Martin",
             "data" : [
                [
                   "Perl",
@@ -106,9 +100,13 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Jared Martin",
+            "name" : "Jared Martin"
          },
          {
+            "name" : "Javier Luque",
+            "id" : "Javier Luque",
             "data" : [
                [
                   "Perl",
@@ -122,21 +120,20 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Javier Luque",
-            "id" : "Javier Luque"
+            ]
          },
          {
+            "name" : "Kevin Colyer",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "id" : "Kevin Colyer",
-            "name" : "Kevin Colyer"
+            "id" : "Kevin Colyer"
          },
          {
+            "name" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
@@ -151,12 +148,11 @@
                   1
                ]
             ],
-            "name" : "Laurent Rosenfeld",
             "id" : "Laurent Rosenfeld"
          },
          {
-            "id" : "Lubos Kolouch",
             "name" : "Lubos Kolouch",
+            "id" : "Lubos Kolouch",
             "data" : [
                [
                   "Perl",
@@ -166,7 +162,6 @@
          },
          {
             "id" : "Luca Ferrari",
-            "name" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -176,7 +171,8 @@
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "name" : "Luca Ferrari"
          },
          {
             "data" : [
@@ -189,20 +185,22 @@
                   2
                ]
             ],
-            "name" : "Mark Anderson",
-            "id" : "Mark Anderson"
+            "id" : "Mark Anderson",
+            "name" : "Mark Anderson"
          },
          {
+            "name" : "Markus Holzer",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "name" : "Markus Holzer",
             "id" : "Markus Holzer"
          },
          {
+            "name" : "Matthew Somerville",
+            "id" : "Matthew Somerville",
             "data" : [
                [
                   "Perl",
@@ -212,11 +210,10 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Matthew Somerville",
-            "id" : "Matthew Somerville"
+            ]
          },
          {
+            "name" : "Mohammad S Anwar",
             "data" : [
                [
                   "Perl",
@@ -227,8 +224,7 @@
                   2
                ]
             ],
-            "id" : "Mohammad S Anwar",
-            "name" : "Mohammad S Anwar"
+            "id" : "Mohammad S Anwar"
          },
          {
             "data" : [
@@ -245,69 +241,89 @@
             "name" : "Roger Bell West"
          },
          {
-            "name" : "Simon Proctor",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Shahed Nooshmand",
+            "name" : "Shahed Nooshmand"
+         },
+         {
             "id" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Simon Proctor"
          },
          {
+            "name" : "Wanderdoc",
+            "id" : "Wanderdoc",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ],
-            "id" : "Wanderdoc",
-            "name" : "Wanderdoc"
+            ]
          }
       ]
    },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "tooltip" : {
-      "followPointer" : 1,
-      "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/>"
-   },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge - 056"
+   },
    "series" : [
       {
          "name" : "Perl Weekly Challenge - 056",
-         "colorByPoint" : 1,
          "data" : [
             {
+               "y" : 2,
                "drilldown" : "Alicia Bielsa",
-               "name" : "Alicia Bielsa",
-               "y" : 2
+               "name" : "Alicia Bielsa"
             },
             {
                "drilldown" : "Andrezgz",
-               "name" : "Andrezgz",
-               "y" : 2
+               "y" : 2,
+               "name" : "Andrezgz"
             },
             {
+               "name" : "Arne Sommer",
                "y" : 3,
-               "drilldown" : "Arne Sommer",
-               "name" : "Arne Sommer"
+               "drilldown" : "Arne Sommer"
             },
             {
+               "drilldown" : "Cheok-Yin Fung",
                "y" : 1,
-               "name" : "Cheok-Yin Fung",
-               "drilldown" : "Cheok-Yin Fung"
+               "name" : "Cheok-Yin Fung"
             },
             {
                "drilldown" : "Cristina Heredia",
-               "name" : "Cristina Heredia",
-               "y" : 1
+               "y" : 1,
+               "name" : "Cristina Heredia"
             },
             {
                "name" : "Dave Jacoby",
@@ -315,82 +331,85 @@
                "y" : 3
             },
             {
+               "drilldown" : "E. Choroba",
                "y" : 2,
-               "name" : "E. Choroba",
-               "drilldown" : "E. Choroba"
+               "name" : "E. Choroba"
             },
             {
-               "y" : 3,
+               "name" : "Jared Martin",
                "drilldown" : "Jared Martin",
-               "name" : "Jared Martin"
+               "y" : 3
             },
             {
                "drilldown" : "Javier Luque",
-               "name" : "Javier Luque",
-               "y" : 5
+               "y" : 5,
+               "name" : "Javier Luque"
             },
             {
-               "name" : "Kevin Colyer",
+               "y" : 2,
                "drilldown" : "Kevin Colyer",
-               "y" : 2
+               "name" : "Kevin Colyer"
             },
             {
-               "y" : 5,
                "drilldown" : "Laurent Rosenfeld",
+               "y" : 5,
                "name" : "Laurent Rosenfeld"
             },
             {
-               "name" : "Lubos Kolouch",
+               "y" : 2,
                "drilldown" : "Lubos Kolouch",
-               "y" : 2
+               "name" : "Lubos Kolouch"
             },
             {
-               "drilldown" : "Luca Ferrari",
                "name" : "Luca Ferrari",
-               "y" : 4
+               "y" : 4,
+               "drilldown" : "Luca Ferrari"
             },
             {
+               "y" : 4,
                "drilldown" : "Mark Anderson",
-               "name" : "Mark Anderson",
-               "y" : 4
+               "name" : "Mark Anderson"
             },
             {
-               "y" : 2,
                "name" : "Markus Holzer",
+               "y" : 2,
                "drilldown" : "Markus Holzer"
             },
             {
+               "name" : "Matthew Somerville",
                "y" : 3,
-               "drilldown" : "Matthew Somerville",
-               "name" : "Matthew Somerville"
+               "drilldown" : "Matthew Somerville"
             },
             {
-               "y" : 4,
                "name" : "Mohammad S Anwar",
+               "y" : 4,
                "drilldown" : "Mohammad S Anwar"
             },
             {
+               "drilldown" : "Roger Bell West",
                "y" : 3,
-               "name" : "Roger Bell West",
-               "drilldown" : "Roger Bell West"
+               "name" : "Roger Bell West"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Shahed Nooshmand",
+               "name" : "Shahed Nooshmand"
             },
             {
-               "y" : 2,
                "drilldown" : "Simon Proctor",
+               "y" : 2,
                "name" : "Simon Proctor"
             },
             {
-               "drilldown" : "Wanderdoc",
                "name" : "Wanderdoc",
+               "drilldown" : "Wanderdoc",
                "y" : 1
             }
-         ]
+         ],
+         "colorByPoint" : 1
       }
    ],
-   "title" : {
-      "text" : "Perl Weekly Challenge - 056"
-   },
-   "legend" : {
-      "enabled" : 0
+   "subtitle" : {
+      "text" : "[Champions: 21] Last updated at 2020-04-19 11:18:49 GMT"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 4aa6e99338..86f39766bc 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -3,17 +3,29 @@
       "pointFormat" : "<b>{point.y:.0f}</b>"
    },
    "yAxis" : {
+      "min" : 0,
       "title" : {
          "text" : null
-      },
-      "min" : 0
+      }
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "xAxis" : {
+      "type" : "category",
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      }
    },
    "series" : [
       {
          "data" : [
             [
                "Blog",
-               621
+               622
             ],
             [
                "Perl",
@@ -21,43 +33,31 @@
             ],
             [
                "Raku",
-               1483
+               1485
             ]
          ],
          "dataLabels" : {
-            "format" : "{point.y:.0f}",
+            "align" : "right",
+            "enabled" : "true",
             "rotation" : -90,
+            "color" : "#FFFFFF",
+            "y" : 10,
             "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
+               "fontFamily" : "Verdana, sans-serif",
+               "fontSize" : "13px"
             },
-            "y" : 10,
-            "align" : "right",
-            "color" : "#FFFFFF",
-            "enabled" : "true"
+            "format" : "{point.y:.0f}"
          },
          "name" : "Contributions"
       }
    ],
+   "subtitle" : {
+      "text" : "Last updated at 2020-04-19 11:18:49 GMT"
+   },
    "title" : {
       "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
    },
    "legend" : {
       "enabled" : "false"
-   },
-   "subtitle" : {
-      "text" : "Last updated at 2020-04-19 09:53:38 GMT"
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      }
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 12a2ce4a86..1c8829132b 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,331 +1,24 @@
 {
-   "tooltip" : {
-      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
-      "headerFormat" : "<span style=\"font-size:11px\"></span>",
-      "followPointer" : "true"
+   "chart" : {
+      "type" : "column"
+   },
+   "xAxis" : {
+      "type" : "category"
    },
-   "series" : [
-      {
-         "data" : [
-            {
-               "name" : "#001",
-               "drilldown" : "001",
-               "y" : 140
-            },
-            {
-               "drilldown" : "002",
-               "name" : "#002",
-               "y" : 109
-            },
-            {
-               "y" : 71,
-               "name" : "#003",
-               "drilldown" : "003"
-            },
-            {
-               "y" : 91,
-               "drilldown" : "004",
-               "name" : "#004"
-            },
-            {
-               "name" : "#005",
-               "drilldown" : "005",
-               "y" : 71
-            },
-            {
-               "name" : "#006",
-               "drilldown" : "006",
-               "y" : 52
-            },
-            {
-               "drilldown" : "007",
-               "name" : "#007",
-               "y" : 58
-            },
-            {
-               "y" : 70,
-               "name" : "#008",
-               "drilldown" : "008"
-            },
-            {
-               "y" : 68,
-               "drilldown" : "009",
-               "name" : "#009"
-            },
-            {
-               "y" : 60,
-               "drilldown" : "010",
-               "name" : "#010"
-            },
-            {
-               "drilldown" : "011",
-               "name" : "#011",
-               "y" : 79
-            },
-            {
-               "y" : 83,
-               "drilldown" : "012",
-               "name" : "#012"
-            },
-            {
-               "y" : 76,
-               "name" : "#013",
-               "drilldown" : "013"
-            },
-            {
-               "name" : "#014",
-               "drilldown" : "014",
-               "y" : 96
-            },
-            {
-               "name" : "#015",
-               "drilldown" : "015",
-               "y" : 93
-            },
-            {
-               "drilldown" : "016",
-               "name" : "#016",
-               "y" : 66
-            },
-            {
-               "y" : 79,
-               "name" : "#017",
-               "drilldown" : "017"
-            },
-            {
-               "y" : 76,
-               "drilldown" : "018",
-               "name" : "#018"
-            },
-            {
-               "drilldown" : "019",
-               "name" : "#019",
-               "y" : 97
-            },
-            {
-               "name" : "#020",
-               "drilldown" : "020",
-               "y" : 95
-            },
-            {
-               "name" : "#021",
-               "drilldown" : "021",
-               "y" : 67
-            },
-            {
-               "name" : "#022",
-               "drilldown" : "022",
-               "y" : 63
-            },
-            {
-               "name" : "#023",
-               "drilldown" : "023",
-               "y" : 91
-            },
-            {
-               "y" : 70,
-               "name" : "#024",
-               "drilldown" : "024"
-            },
-            {
-               "y" : 55,
-               "drilldown" : "025",
-               "name" : "#025"
-            },
-            {
-               "y" : 70,
-               "name" : "#026",
-               "drilldown" : "026"
-            },
-            {
-               "y" : 58,
-               "name" : "#027",
-               "drilldown" : "027"
-            },
-            {
-               "drilldown" : "028",
-               "name" : "#028",
-               "y" : 78
-            },
-            {
-               "y" : 77,
-               "name" : "#029",
-               "drilldown" : "029"
-            },
-            {
-               "y" : 115,
-               "name" : "#030",
-               "drilldown" : "030"
-            },
-            {
-               "y" : 87,
-               "name" : "#031",
-               "drilldown" : "031"
-            },
-            {
-               "drilldown" : "032",
-               "name" : "#032",
-               "y" : 92
-            },
-            {
-               "drilldown" : "033",
-               "name" : "#033",
-               "y" : 108
-            },
-            {
-               "name" : "#034",
-               "drilldown" : "034",
-               "y" : 62
-            },
-            {
-               "drilldown" : "035",
-               "name" : "#035",
-               "y" : 62
-            },
-            {
-               "y" : 66,
-               "name" : "#036",
-               "drilldown" : "036"
-            },
-            {
-               "y" : 63,
-               "drilldown" : "037",
-               "name" : "#037"
-            },
-            {
-               "y" : 65,
-               "name" : "#038",
-               "drilldown" : "038"
-            },
-            {
-               "y" : 60,
-               "drilldown" : "039",
-               "name" : "#039"
-            },
-            {
-               "y" : 71,
-               "name" : "#040",
-               "drilldown" : "040"
-            },
-            {
-               "name" : "#041",
-               "drilldown" : "041",
-               "y" : 74
-            },
-            {
-               "y" : 88,
-               "name" : "#042",
-               "drilldown" : "042"
-            },
-            {
-               "y" : 65,
-               "name" : "#043",
-               "drilldown" : "043"
-            },
-            {
-               "name" : "#044",
-               "drilldown" : "044",
-               "y" : 81
-            },
-            {
-               "y" : 94,
-               "name" : "#045",
-               "drilldown" : "045"
-            },
-            {
-               "y" : 83,
-               "drilldown" : "046",
-               "name" : "#046"
-            },
-            {
-               "drilldown" : "047",
-               "name" : "#047",
-               "y" : 81
-            },
-            {
-               "y" : 106,
-               "name" : "#048",
-               "drilldown" : "048"
-            },
-            {
-               "y" : 85,
-               "drilldown" : "049",
-               "name" : "#049"
-            },
-            {
-               "name" : "#050",
-               "drilldown" : "050",
-               "y" : 96
-            },
-            {
-               "name" : "#051",
-               "drilldown" : "051",
-               "y" : 87
-            },
-            {
-               "name" : "#052",
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-         ],
-         "name" : "Perl Weekly Challenge Languages",
-         "colorByPoint" : "true"
-      }
-   ],
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
-   "title" : {
-      "text" : "Perl Weekly Challenge Language"
-   },
-   "legend" : {
-      "enabled" : "false"
-   },
-   "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-04-19 09:53:38 GMT"
-   },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         },
-         "borderWidth" : 0
-      }
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "xAxis" : {
-      "type" : "category"
+   "tooltip" : {
+      "headerFormat" : "<span style=\"font-size:11px\"></span>",
+      "followPointer" : "true",
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>"
    },
    "drilldown" : {
       "series" : [
          {
             "name" : "001",
-            "id" : "001",
             "data" : [
                [
                   "Perl",
@@ -339,9 +32,12 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "id" : "001"
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+            "name" : "002",
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                   "Perl",
@@ -355,11 +51,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "002",
-            "name" : "002"
+            ]
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                   "Perl",
@@ -373,13 +69,9 @@
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-            "name" : "003"
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@@ -393,10 +85,11 @@
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@@ -411,9 +104,12 @@
                   "Blog",
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@@ -427,9 +123,7 @@
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@@ -446,10 +140,11 @@
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@@ -464,12 +159,9 @@
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@@ -483,9 +175,12 @@
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                   "Perl",
@@ -500,8 +195,7 @@
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@@ -518,8 +212,8 @@
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@@ -536,10 +230,12 @@
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+            "id"