- Added solution to Stepping Numbers.

12 files changed, 933 insertions, 894 deletions

diff --git a/challenge-052/mohammad-anwar/perl/ch-1.pl b/challenge-052/mohammad-anwar/perl/ch-1.pl
new file mode 100644
index 0000000000..fe0c399a62
--- /dev/null
+++ b/challenge-052/mohammad-anwar/perl/ch-1.pl
@@ -0,0 +1,24 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+my $start = $ARGV[0] || 100;
+my $stop  = $ARGV[1] || 999;
+
+die "ERROR: Invalid start number [$start]\n"
+    unless ($start >= 100 &&
+            $start <= 999);
+die "ERROR: Invalid stop  number [$stop]\n"
+    unless ($start <= $stop &&
+            $stop  >= 100   &&
+            $stop  <= 999);
+
+while ($start <= $stop) {
+    my ($d1, $d2, $d3) = split //, $start, 3;
+    if ( ((($d1 - $d2) == 1) && (($d2 - $d3) == 1))
+         || ((($d2 - $d1) == 1) && (($d3 - $d2) == 1)) ) {
+        print "$start\n";
+    }
+    $start++;
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index b8f77e456e..150e4c8cad 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,10 +1,38 @@
 {
+   "title" : {
+      "text" : "Perl Weekly Challenge - 052"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "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
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         },
+         "borderWidth" : 0
+      }
+   },
    "series" : [
       {
          "data" : [
             {
-               "y" : 2,
                "name" : "Dave Cross",
+               "y" : 2,
                "drilldown" : "Dave Cross"
             },
             {
@@ -13,19 +41,24 @@
                "y" : 1
             },
             {
-               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari",
                "y" : 4,
-               "name" : "Luca Ferrari"
+               "drilldown" : "Luca Ferrari"
+            },
+            {
+               "drilldown" : "Mohammad S Anwar",
+               "y" : 1,
+               "name" : "Mohammad S Anwar"
             },
             {
-               "name" : "Roger Bell West",
+               "drilldown" : "Roger Bell West",
                "y" : 4,
-               "drilldown" : "Roger Bell West"
+               "name" : "Roger Bell West"
             },
             {
                "drilldown" : "Simon Proctor",
-               "y" : 1,
-               "name" : "Simon Proctor"
+               "name" : "Simon Proctor",
+               "y" : 1
             },
             {
                "drilldown" : "Wanderdoc",
@@ -33,65 +66,42 @@
                "name" : "Wanderdoc"
             },
             {
+               "drilldown" : "Yet Ebreo",
                "name" : "Yet Ebreo",
-               "y" : 1,
-               "drilldown" : "Yet Ebreo"
+               "y" : 1
             }
          ],
-         "name" : "Perl Weekly Challenge - 052",
-         "colorByPoint" : 1
+         "colorByPoint" : 1,
+         "name" : "Perl Weekly Challenge - 052"
       }
    ],
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
    "subtitle" : {
-      "text" : "[Champions: 7] Last updated at 2020-03-16 18:54:22 GMT"
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
-      }
+      "text" : "[Champions: 8] Last updated at 2020-03-16 19:35:32 GMT"
    },
    "legend" : {
       "enabled" : 0
    },
-   "chart" : {
-      "type" : "column"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge - 052"
-   },
    "drilldown" : {
       "series" : [
          {
-            "id" : "Dave Cross",
             "name" : "Dave Cross",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Dave Cross"
          },
          {
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ],
-            "name" : "Dave Jacoby",
-            "id" : "Dave Jacoby"
+            ]
          },
          {
             "name" : "Luca Ferrari",
@@ -108,7 +118,16 @@
             "id" : "Luca Ferrari"
          },
          {
-            "id" : "Roger Bell West",
+            "data" : [
+               [
+                  "Perl",
+                  1
+               ]
+            ],
+            "name" : "Mohammad S Anwar",
+            "id" : "Mohammad S Anwar"
+         },
+         {
             "data" : [
                [
                   "Perl",
@@ -119,7 +138,8 @@
                   2
                ]
             ],
-            "name" : "Roger Bell West"
+            "name" : "Roger Bell West",
+            "id" : "Roger Bell West"
          },
          {
             "id" : "Simon Proctor",
@@ -132,30 +152,25 @@
             "name" : "Simon Proctor"
          },
          {
-            "name" : "Wanderdoc",
+            "id" : "Wanderdoc",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Wanderdoc"
+            "name" : "Wanderdoc"
          },
          {
+            "id" : "Yet Ebreo",
             "name" : "Yet Ebreo",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ],
-            "id" : "Yet Ebreo"
+            ]
          }
       ]
-   },
-   "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
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index b43d83d65b..dffa0a445a 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,24 +1,18 @@
 {
-   "legend" : {
-      "enabled" : "false"
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
-   },
-   "yAxis" : {
-      "min" : 0,
-      "title" : {
-         "text" : null
-      }
-   },
    "series" : [
       {
+         "dataLabels" : {
+            "y" : 10,
+            "style" : {
+               "fontFamily" : "Verdana, sans-serif",
+               "fontSize" : "13px"
+            },
+            "enabled" : "true",
+            "align" : "right",
+            "color" : "#FFFFFF",
+            "rotation" : -90,
+            "format" : "{point.y:.0f}"
+         },
          "data" : [
             [
                "Blog",
@@ -26,38 +20,44 @@
             ],
             [
                "Perl",
-               2168
+               2169
             ],
             [
                "Raku",
                1326
             ]
          ],
-         "dataLabels" : {
-            "rotation" : -90,
-            "align" : "right",
-            "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            },
-            "enabled" : "true",
-            "y" : 10,
-            "color" : "#FFFFFF",
-            "format" : "{point.y:.0f}"
-         },
          "name" : "Contributions"
       }
    ],
    "subtitle" : {
-      "text" : "Last updated at 2020-03-16 18:54:22 GMT"
+      "text" : "Last updated at 2020-03-16 19:35:32 GMT"
+   },
+   "legend" : {
+      "enabled" : "false"
    },
    "xAxis" : {
+      "type" : "category",
       "labels" : {
          "style" : {
             "fontFamily" : "Verdana, sans-serif",
             "fontSize" : "13px"
          }
+      }
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : null
       },
-      "type" : "category"
+      "min" : 0
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 265f06856e..005931cde4 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,301 +1,12 @@
 {
-   "series" : [
-      {
-         "colorByPoint" : "true",
-         "data" : [
-            {
-               "y" : 140,
-               "name" : "#001",
-               "drilldown" : "001"
-            },
-            {
-               "name" : "#002",
-               "y" : 109,
-               "drilldown" : "002"
-            },
-            {
-               "y" : 71,
-               "name" : "#003",
-               "drilldown" : "003"
-            },
-            {
-               "drilldown" : "004",
-               "y" : 91,
-               "name" : "#004"
-            },
-            {
-               "drilldown" : "005",
-               "name" : "#005",
-               "y" : 71
-            },
-            {
-               "drilldown" : "006",
-               "name" : "#006",
-               "y" : 52
-            },
-            {
-               "drilldown" : "007",
-               "name" : "#007",
-               "y" : 58
-            },
-            {
-               "name" : "#008",
-               "y" : 70,
-               "drilldown" : "008"
-            },
-            {
-               "drilldown" : "009",
-               "y" : 68,
-               "name" : "#009"
-            },
-            {
-               "y" : 60,
-               "name" : "#010",
-               "drilldown" : "010"
-            },
-            {
-               "name" : "#011",
-               "y" : 79,
-               "drilldown" : "011"
-            },
-            {
-               "y" : 83,
-               "name" : "#012",
-               "drilldown" : "012"
-            },
-            {
-               "drilldown" : "013",
-               "name" : "#013",
-               "y" : 76
-            },
-            {
-               "y" : 96,
-               "name" : "#014",
-               "drilldown" : "014"
-            },
-            {
-               "drilldown" : "015",
-               "name" : "#015",
-               "y" : 93
-            },
-            {
-               "drilldown" : "016",
-               "y" : 66,
-               "name" : "#016"
-            },
-            {
-               "y" : 79,
-               "name" : "#017",
-               "drilldown" : "017"
-            },
-            {
-               "y" : 76,
-               "name" : "#018",
-               "drilldown" : "018"
-            },
-            {
-               "name" : "#019",
-               "y" : 97,
-               "drilldown" : "019"
-            },
-            {
-               "name" : "#020",
-               "y" : 95,
-               "drilldown" : "020"
-            },
-            {
-               "y" : 67,
-               "name" : "#021",
-               "drilldown" : "021"
-            },
-            {
-               "drilldown" : "022",
-               "y" : 63,
-               "name" : "#022"
-            },
-            {
-               "name" : "#023",
-               "y" : 91,
-               "drilldown" : "023"
-            },
-            {
-               "name" : "#024",
-               "y" : 70,
-               "drilldown" : "024"
-            },
-            {
-               "y" : 55,
-               "name" : "#025",
-               "drilldown" : "025"
-            },
-            {
-               "y" : 70,
-               "name" : "#026",
-               "drilldown" : "026"
-            },
-            {
-               "drilldown" : "027",
-               "y" : 58,
-               "name" : "#027"
-            },
-            {
-               "y" : 78,
-               "name" : "#028",
-               "drilldown" : "028"
-            },
-            {
-               "drilldown" : "029",
-               "name" : "#029",
-               "y" : 77
-            },
-            {
-               "drilldown" : "030",
-               "y" : 115,
-               "name" : "#030"
-            },
-            {
-               "y" : 87,
-               "name" : "#031",
-               "drilldown" : "031"
-            },
-            {
-               "drilldown" : "032",
-               "name" : "#032",
-               "y" : 92
-            },
-            {
-               "y" : 108,
-               "name" : "#033",
-               "drilldown" : "033"
-            },
-            {
-               "name" : "#034",
-               "y" : 62,
-               "drilldown" : "034"
-            },
-            {
-               "y" : 62,
-               "name" : "#035",
-               "drilldown" : "035"
-            },
-            {
-               "name" : "#036",
-               "y" : 63,
-               "drilldown" : "036"
-            },
-            {
-               "y" : 63,
-               "name" : "#037",
-               "drilldown" : "037"
-            },
-            {
-               "drilldown" : "038",
-               "name" : "#038",
-               "y" : 65
-            },
-            {
-               "drilldown" : "039",
-               "name" : "#039",
-               "y" : 60
-            },
-            {
-               "y" : 66,
-               "name" : "#040",
-               "drilldown" : "040"
-            },
-            {
-               "name" : "#041",
-               "y" : 69,
-               "drilldown" : "041"
-            },
-            {
-               "drilldown" : "042",
-               "y" : 88,
-               "name" : "#042"
-            },
-            {
-               "name" : "#043",
-               "y" : 65,
-               "drilldown" : "043"
-            },
-            {
-               "name" : "#044",
-               "y" : 81,
-               "drilldown" : "044"
-            },
-            {
-               "drilldown" : "045",
-               "y" : 94,
-               "name" : "#045"
-            },
-            {
-               "name" : "#046",
-               "y" : 83,
-               "drilldown" : "046"
-            },
-            {
-               "drilldown" : "047",
-               "name" : "#047",
-               "y" : 81
-            },
-            {
-               "drilldown" : "048",
-               "name" : "#048",
-               "y" : 106
-            },
-            {
-               "drilldown" : "049",
-               "y" : 84,
-               "name" : "#049"
-            },
-            {
-               "drilldown" : "050",
-               "name" : "#050",
-               "y" : 95
-            },
-            {
-               "y" : 86,
-               "name" : "#051",
-               "drilldown" : "051"
-            },
-            {
-               "y" : 15,
-               "name" : "#052",
-               "drilldown" : "052"
-            }
-         ],
-         "name" : "Perl Weekly Challenge Languages"
-      }
-   ],
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-03-16 18:54:22 GMT"
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         },
-         "borderWidth" : 0
-      }
-   },
    "legend" : {
       "enabled" : "false"
    },
-   "chart" : {
-      "type" : "column"
-   },
    "drilldown" : {
       "series" : [
          {
+            "id" : "001",
+            "name" : "001",
             "data" : [
                [
                   "Perl",
@@ -309,9 +20,7 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "001",
-            "id" : "001"
+            ]
          },
          {
             "id" : "002",
@@ -350,7 +59,6 @@
             "name" : "003"
          },
          {
-            "name" : "004",
             "data" : [
                [
                   "Perl",
@@ -365,11 +73,10 @@
                   10
                ]
             ],
+            "name" : "004",
             "id" : "004"
          },
          {
-            "id" : "005",
-            "name" : "005",
             "data" : [
                [
                   "Perl",
@@ -383,10 +90,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "005",
+            "id" : "005"
          },
          {
-            "id" : "006",
             "name" : "006",
             "data" : [
                [
@@ -401,10 +109,12 @@
                   "Blog",
                   7
                ]
-            ]
+            ],
+            "id" : "006"
          },
          {
             "id" : "007",
+            "name" : "007",
             "data" : [
                [
                   "Perl",
@@ -418,10 +128,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "007"
+            ]
          },
          {
+            "id" : "008",
             "name" : "008",
             "data" : [
                [
@@ -436,11 +146,9 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "008"
+            ]
          },
          {
-            "id" : "009",
             "name" : "009",
             "data" : [
                [
@@ -455,9 +163,11 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "id" : "009"
          },
          {
+            "id" : "010",
             "data" : [
                [
                   "Perl",
@@ -472,8 +182,7 @@
                   11
                ]
             ],
-            "name" : "010",
-            "id" : "010"
+            "name" : "010"
          },
          {
             "data" : [
@@ -494,7 +203,7 @@
             "id" : "011"
          },
          {
-            "name" : "012",
+            "id" : "012",
             "data" : [
                [
                   "Perl",
@@ -509,7 +218,7 @@
                   11
                ]
             ],
-            "id" : "012"
+            "name" : "012"
          },
          {
             "id" : "013",
@@ -548,6 +257,7 @@
             "id" : "014"
          },
          {
+            "id" : "015",
             "data" : [
                [
                   "Perl",
@@ -562,10 +272,11 @@
                   15
                ]
             ],
-            "name" : "015",
-            "id" : "015"
+            "name" : "015"
          },
          {
+            "id" : "016",
+            "name" : "016",
             "data" : [
                [
                   "Perl",
@@ -579,12 +290,9 @@
                   "Blog",
                   12
                ]
-            ],
-            "name" : "016",
-            "id" : "016"
+            ]
          },
          {
-            "name" : "017",
             "data" : [
                [
                   "Perl",
@@ -599,9 +307,12 @@
                   12
                ]
             ],
+            "name" : "017",
             "id" : "017"
          },
          {
+            "id" : "018",
+            "name" : "018",
             "data" : [
                [
                   "Perl",
@@ -615,11 +326,10 @@
                   "Blog",
                   14
                ]
-            ],
-            "name" : "018",
-            "id" : "018"
+            ]
          },
          {
+            "name" : "019",
             "data" : [
                [
                   "Perl",
@@ -634,10 +344,10 @@
                   13
                ]
             ],
-            "name" : "019",
             "id" : "019"
          },
          {
+            "name" : "020",
             "data" : [
                [
                   "Perl",
@@ -652,11 +362,9 @@
                   13
                ]
             ],
-            "name" : "020",
             "id" : "020"
          },
          {
-            "id" : "021",
             "name" : "021",
             "data" : [
                [
@@ -671,9 +379,12 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "021"
          },
          {
+            "id" : "022",
+            "name" : "022",
             "data" : [
                [
                   "Perl",
@@ -687,9 +398,7 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "022",
-            "id" : "022"
+            ]
          },
          {
             "data" : [
@@ -710,7 +419,7 @@
             "id" : "023"
          },
          {
-            "id" : "024",
+            "name" : "024",
             "data" : [
                [
                   "Perl",
@@ -725,9 +434,10 @@
                   11
                ]
             ],
-            "name" : "024"
+            "id" : "024"
          },
          {
+            "id" : "025",
             "name" : "025",
             "data" : [
                [
@@ -742,8 +452,7 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "025"
+            ]
          },
          {
             "name" : "026",
@@ -764,6 +473,7 @@
             "id" : "026"
          },
          {
+            "id" : "027",
             "name" : "027",
             "data" : [
                [
@@ -778,10 +488,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "027"
+            ]
          },
          {
+            "id" : "028",
             "name" : "028",
             "data" : [
                [
@@ -796,11 +506,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "028"
+            ]
          },
          {
-            "name" : "029",
+            "id" : "029",
             "data" : [
                [
                   "Perl",
@@ -815,10 +524,11 @@
                   12
                ]
             ],
-            "id" : "029"
+            "name" : "029"
          },
          {
             "id" : "030",
+            "name" : "030",
             "data" : [
                [
                   "Perl",
@@ -832,8 +542,7 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "030"
+            ]
          },
          {
             "id" : "031",
@@ -854,7 +563,6 @@
             ]
          },
          {
-            "id" : "032",
             "data" : [
                [
                   "Perl",
@@ -869,10 +577,10 @@
                   10
                ]
             ],
-            "name" : "032"
+            "name" : "032",
+            "id" : "032"
          },
          {
-            "name" : "033",
             "data" : [
                [
                   "Perl",
@@ -887,11 +595,10 @@
                   10
                ]
             ],
+            "name" : "033",
             "id" : "033"
          },
          {
-            "id" : "034",
-            "name" : "034",
             "data" : [
                [
                   "Perl",
@@ -905,9 +612,13 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "034",
+            "id" : "034"
          },
          {
+            "id" : "035",
+            "name" : "035",
             "data" : [
                [
                   "Perl",
@@ -921,11 +632,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "035",
-            "id" : "035"
+            ]
          },
          {
+            "id" : "036",
             "name" : "036",
             "data" : [
                [
@@ -940,8 +650,7 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "036"
+            ]
          },
          {
             "id" : "037",
@@ -962,6 +671,7 @@
             ]
          },
          {
+            "id" : "038",
             "data" : [
                [
                   "Perl",
@@ -976,11 +686,10 @@
                   12
                ]
             ],
-            "name" : "038",
-            "id" : "038"
+            "name" : "038"
          },
          {
-            "name" : "039",
+            "id" : "039",
             "data" : [
                [
                   "Perl",
@@ -995,10 +704,10 @@
                   12
                ]
             ],
-            "id" : "039"
+            "name" : "039"
          },
          {
-            "name" : "040",
+            "id" : "040",
             "data" : [
                [
                   "Perl",
@@ -1013,9 +722,11 @@
                   9
                ]
             ],
-            "id" : "040"
+            "name" : "040"
          },
          {
+            "id" : "041",
+            "name" : "041",
             "data" : [
                [
                   "Perl",
@@ -1029,9 +740,7 @@
                   "Blog",
                   8
                ]
-            ],
-            "name" : "041",
-            "id" : "041"
+            ]
          },
          {
             "id" : "042",
@@ -1052,7 +761,6 @@
             ]
          },
          {
-            "id" : "043",
             "data" : [
                [
                   "Perl",
@@ -1067,11 +775,11 @@
                   10
                ]
             ],
-            "name" : "043"
+            "name" : "043",
+            "id" : "043"
          },
          {
             "id" : "044",
-            "name" : "044",
             "data" : [
                [
                   "Perl",
@@ -1085,7 +793,8 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "044"
          },
          {
             "name" : "045",
@@ -1106,7 +815,6 @@
             "id" : "045"
          },
          {
-            "name" : "046",
             "data" : [
                [
                   "Perl",
@@ -1121,9 +829,11 @@
                   10
                ]
             ],
+            "name" : "046",
             "id" : "046"
          },
          {
+            "id" : "047",
             "data" : [
                [
                   "Perl",
@@ -1138,10 +848,10 @@
                   10
                ]
             ],