- Added solution by David Santiago.

15 files changed, 1194 insertions, 1115 deletions

diff --git a/challenge-144/david-santiago/raku/ch-1.raku b/challenge-144/david-santiago/raku/ch-1.raku
new file mode 100755
index 0000000000..422fb4955f
--- /dev/null
+++ b/challenge-144/david-santiago/raku/ch-1.raku
@@ -0,0 +1,64 @@
+#!/usr/bin/env raku
+
+sub sieve-of-atkin(Int $limit --> List){
+    my @sieve;
+    my @prime-list = (2,3);
+    
+    my $x = 1;
+    while $x ** 2 < $limit {
+	my $y = 1;
+	while $y ** 2 < $limit {
+
+	    my $n = 4 * $x ** 2 + $y ** 2;
+	    
+	    if $n <= $limit && ($n % 12 == 1 || $n % 12 == 5) {
+		@sieve[$n] = @sieve[$n] ?? False !! True;
+	    }
+
+	    $n = 3 * $x ** 2 + $y ** 2;
+	    if $n <= $limit && $n % 12 == 7 {
+		@sieve[$n] = @sieve[$n] ?? False !! True;
+	    }
+
+	    $n = (3 * $x ** 2 ) - $y ** 2;
+	    if $n <= $limit && $x > $y && $n % 12 == 11 {
+		@sieve[$n] = @sieve[$n] ?? False !! True;
+	    }
+	    $y++;
+	}
+	$x++;
+    }
+    # Mark all multiples of squares as non-prime
+    my $r = 5;
+    while $r ** 2 < $limit {
+	if @sieve[$r] {
+	    loop ( my $i = $r**2; $i < $limit; $i += $r**2 ) {
+		@sieve[$i] = False;
+	    }
+	}
+	$r++;
+    }
+
+    for @sieve.kv -> $index, $is-prime {
+	@prime-list.append($index) if $is-prime;
+    }
+
+    return @prime-list;
+}
+
+
+sub MAIN() {
+    my @prime-list := sieve-of-atkin(100);
+    my @combinations = (|@prime-list xx 2 ).flat.combinations(2);
+    
+    my %semi-primes;
+    for @combinations -> @comb {
+	my $candidate = @comb[0]*@comb[1];
+	%semi-primes{$candidate} = (@comb[0],@comb[1]) if $candidate < 100;
+    }
+    
+    for %semi-primes.keys.sort {
+	say "$_ is Semiprime as $_ = {%semi-primes{$_}.join(' x ')}";
+    }
+    
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 95cd849d55..80342d9f33 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,12 +1,11 @@
 {
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
+   "legend" : {
+      "enabled" : 0
    },
    "drilldown" : {
       "series" : [
          {
+            "name" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -17,22 +16,31 @@
                   1
                ]
             ],
-            "name" : "Dave Jacoby",
             "id" : "Dave Jacoby"
          },
          {
             "data" : [
                [
+                  "Raku",
+                  1
+               ]
+            ],
+            "id" : "David Santiago",
+            "name" : "David Santiago"
+         },
+         {
+            "id" : "E. Choroba",
+            "data" : [
+               [
                   "Perl",
                   2
                ]
             ],
-            "id" : "E. Choroba",
             "name" : "E. Choroba"
          },
          {
-            "id" : "Luca Ferrari",
             "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -45,23 +53,23 @@
             ]
          },
          {
-            "name" : "Mark Anderson",
-            "id" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
                   1
                ]
-            ]
+            ],
+            "id" : "Mark Anderson",
+            "name" : "Mark Anderson"
          },
          {
+            "name" : "Paulo Custodio",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Paulo Custodio",
             "id" : "Paulo Custodio"
          },
          {
@@ -79,6 +87,7 @@
             "name" : "Peter Campbell Smith"
          },
          {
+            "id" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -93,10 +102,10 @@
                   1
                ]
             ],
-            "name" : "Roger Bell_West",
-            "id" : "Roger Bell_West"
+            "name" : "Roger Bell_West"
          },
          {
+            "name" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
@@ -107,58 +116,63 @@
                   2
                ]
             ],
-            "name" : "Ulrich Rieke",
             "id" : "Ulrich Rieke"
          }
       ]
    },
+   "xAxis" : {
+      "type" : "category"
+   },
    "title" : {
       "text" : "The Weekly Challenge - 144"
    },
    "chart" : {
       "type" : "column"
    },
+   "subtitle" : {
+      "text" : "[Champions: 9] Last updated at 2021-12-22 02:20:21 GMT"
+   },
    "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
+      "followPointer" : 1,
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
    },
    "plotOptions" : {
       "series" : {
          "borderWidth" : 0,
          "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
+            "enabled" : 1,
+            "format" : "{point.y}"
          }
       }
    },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "legend" : {
-      "enabled" : 0
-   },
-   "subtitle" : {
-      "text" : "[Champions: 8] Last updated at 2021-12-22 02:01:44 GMT"
-   },
    "series" : [
       {
-         "colorByPoint" : 1,
          "name" : "The Weekly Challenge - 144",
          "data" : [
             {
+               "name" : "Dave Jacoby",
                "drilldown" : "Dave Jacoby",
-               "y" : 3,
-               "name" : "Dave Jacoby"
+               "y" : 3
+            },
+            {
+               "drilldown" : "David Santiago",
+               "y" : 1,
+               "name" : "David Santiago"
             },
             {
-               "drilldown" : "E. Choroba",
                "name" : "E. Choroba",
+               "drilldown" : "E. Choroba",
                "y" : 2
             },
             {
-               "y" : 6,
                "name" : "Luca Ferrari",
+               "y" : 6,
                "drilldown" : "Luca Ferrari"
             },
             {
@@ -177,16 +191,17 @@
                "drilldown" : "Peter Campbell Smith"
             },
             {
-               "name" : "Roger Bell_West",
+               "drilldown" : "Roger Bell_West",
                "y" : 5,
-               "drilldown" : "Roger Bell_West"
+               "name" : "Roger Bell_West"
             },
             {
-               "y" : 4,
                "name" : "Ulrich Rieke",
-               "drilldown" : "Ulrich Rieke"
+               "drilldown" : "Ulrich Rieke",
+               "y" : 4
             }
-         ]
+         ],
+         "colorByPoint" : 1
       }
    ]
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 640586f839..056a84ad78 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,19 +1,18 @@
 {
+   "xAxis" : {
+      "type" : "category",
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      }
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
    "series" : [
       {
-         "name" : "Contributions",
-         "dataLabels" : {
-            "format" : "{point.y:.0f}",
-            "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            },
-            "align" : "right",
-            "color" : "#FFFFFF",
-            "y" : 10,
-            "enabled" : "true",
-            "rotation" : -90
-         },
          "data" : [
             [
                "Blog",
@@ -25,39 +24,40 @@
             ],
             [
                "Raku",
-               4172
+               4173
             ]
-         ]
+         ],
+         "name" : "Contributions",
+         "dataLabels" : {
+            "rotation" : -90,
+            "format" : "{point.y:.0f}",
+            "align" : "right",
+            "enabled" : "true",
+            "y" : 10,
+            "color" : "#FFFFFF",
+            "style" : {
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
+            }
+         }
       }
    ],
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
+   "yAxis" : {
+      "title" : {
+         "text" : null
+      },
+      "min" : 0
    },
    "chart" : {
       "type" : "column"
    },
-   "subtitle" : {
-      "text" : "Last updated at 2021-12-22 02:01:44 GMT"
-   },
    "title" : {
       "text" : "The Weekly Challenge Contributions [2019 - 2021]"
    },
-   "legend" : {
-      "enabled" : "false"
-   },
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      }
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    },
-   "yAxis" : {
-      "title" : {
-         "text" : null
-      },
-      "min" : 0
+   "subtitle" : {
+      "text" : "Last updated at 2021-12-22 02:20:21 GMT"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 967cf5bde5..06e120c9e0 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,9 +1,13 @@
 {
+   "xAxis" : {
+      "type" : "category"
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
    "drilldown" : {
       "series" : [
          {
-            "id" : "001",
-            "name" : "001",
             "data" : [
                [
                   "Perl",
@@ -17,10 +21,11 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "id" : "001",
+            "name" : "001"
          },
          {
-            "name" : "002",
             "id" : "002",
             "data" : [
                [
@@ -35,11 +40,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "002"
          },
          {
             "name" : "003",
-            "id" : "003",
             "data" : [
                [
                   "Perl",
@@ -53,9 +58,11 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "id" : "003"
          },
          {
+            "id" : "004",
             "data" : [
                [
                   "Perl",
@@ -70,7 +77,6 @@
                   10
                ]
             ],
-            "id" : "004",
             "name" : "004"
          },
          {
@@ -110,7 +116,6 @@
             "name" : "006"
          },
          {
-            "id" : "007",
             "name" : "007",
             "data" : [
                [
@@ -125,11 +130,10 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "007"
          },
          {
-            "name" : "008",
-            "id" : "008",
             "data" : [
                [
                   "Perl",
@@ -143,7 +147,9 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "008",
+            "name" : "008"
          },
          {
             "data" : [
@@ -160,11 +166,10 @@
                   13
                ]
             ],
-            "name" : "009",
-            "id" : "009"
+            "id" : "009",
+            "name" : "009"
          },
          {
-            "name" : "010",
             "id" : "010",
             "data" : [
                [
@@ -179,9 +184,12 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "010"
          },
          {
+            "name" : "011",
+            "id" : "011",
             "data" : [
                [
                   "Perl",
@@ -195,13 +203,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "011",
-            "id" : "011"
+            ]
          },
          {
             "name" : "012",
-            "id" : "012",
             "data" : [
                [
                   "Perl",
@@ -215,9 +220,11 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "id" : "012"
          },
          {
+            "id" : "013",
             "data" : [
                [
                   "Perl",
@@ -232,8 +239,7 @@
                   13
                ]
             ],
-            "name" : "013",
-            "id" : "013"
+            "name" : "013"
          },
          {
             "data" : [
@@ -254,6 +260,7 @@
             "name" : "014"
          },
          {
+            "name" : "015",
             "data" : [
                [
                   "Perl",
@@ -268,12 +275,10 @@
                   15
                ]
             ],
-            "id" : "015",
-            "name" : "015"
+            "id" : "015"
          },
          {
             "id" : "016",
-            "name" : "016",
             "data" : [
                [
                   "Perl",
@@ -287,9 +292,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "016"
          },
          {
+            "name" : "017",
             "data" : [
                [
                   "Perl",
@@ -304,10 +311,10 @@
                   12
                ]
             ],
-            "name" : "017",
             "id" : "017"
          },
          {
+            "id" : "018",
             "data" : [
                [
                   "Perl",
@@ -322,8 +329,7 @@
                   14
                ]
             ],
-            "name" : "018",
-            "id" : "018"
+            "name" : "018"
          },
          {
             "name" : "019",
@@ -358,12 +364,10 @@
                   13
                ]
             ],
-            "name" : "020",
-            "id" : "020"
+            "id" : "020",
+            "name" : "020"
          },
          {
-            "name" : "021",
-            "id" : "021",
             "data" : [
                [
                   "Perl",
@@ -377,9 +381,13 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "021",
+            "name" : "021"
          },
          {
+            "name" : "022",
+            "id" : "022",
             "data" : [
                [
                   "Perl",
@@ -393,13 +401,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "022",
-            "id" : "022"
+            ]
          },
          {
-            "id" : "023",
             "name" : "023",
+            "id" : "023",
             "data" : [
                [
                   "Perl",
@@ -416,7 +422,6 @@
             ]
          },
          {
-            "name" : "024",
             "id" : "024",
             "data" : [
                [
@@ -431,9 +436,11 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "024"
          },
          {
+            "name" : "025",
             "data" : [
                [
                   "Perl",
@@ -448,11 +455,9 @@
                   12
                ]
             ],
-            "id" : "025",
-            "name" : "025"
+            "id" : "025"
          },
          {
-            "id" : "026",
             "name" : "026",
             "data" : [
                [
@@ -467,7 +472,8 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "026"
          },
          {
             "data" : [
@@ -484,10 +490,11 @@
                   9
                ]
             ],
-            "name" : "027",
-            "id" : "027"
+            "id" : "027",
+            "name" : "027"
          },
          {
+            "name" : "028",
             "data" : [
                [
                   "Perl",
@@ -502,8 +509,7 @@
                   9
                ]
             ],
-            "id" : "028",
-            "name" : "028"
+            "id" : "028"
          },
          {
             "data" : [
@@ -520,8 +526,8 @@
                   12
                ]
             ],
-            "name" : "029",
-            "id" : "029"
+            "id" : "029",
+            "name" : "029"
          },
          {
             "data" : [
@@ -538,10 +544,11 @@
                   10
                ]
             ],
-            "name" : "030",
-            "id" : "030"
+            "id" : "030",
+            "name" : "030"
          },
          {
+            "id" : "031",
             "data" : [
                [
                   "Perl",
@@ -556,12 +563,11 @@
                   9
                ]
             ],
-            "name" : "031",
-            "id" : "031"
+            "name" : "031"
          },
          {
-            "id" : "032",
             "name" : "032",
+            "id" : "032",
             "data" : [
                [
                   "Perl",
@@ -579,7 +585,6 @@
          },
          {
             "name" : "033",
-            "id" : "033",
             "data" : [
                [
                   "Perl",
@@ -593,7 +598,8 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "033"
          },
          {
             "name" : "034",
@@ -614,8 +620,6 @@
             ]
          },
          {
-            "id" : "035",
-            "name" : "035",
             "data" : [
                [
                   "Perl",
@@ -629,9 +633,13 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "id" : "035",
+            "name" : "035"
          },
          {
+            "name" : "036",
+            "id" : "036",
             "data" : [
                [
                   "Perl",
@@ -645,13 +653,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "036",
-            "name" : "036"
+            ]
          },
          {
-            "name" : "037",
-            "id" : "037",
             "data" : [
                [
                   "Perl",
@@ -665,9 +669,12 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "id" : "037",
+            "name" : "037"
          },
          {
+            "id" : "038",
             "data" : [
                [
                   "Perl",
@@ -682,11 +689,9 @@
                   12
                ]
             ],
-            "name" : "038",
-            "id" : "038"
+            "name" : "038"
          },
          {
-            "id" : "039",
             "name" : "039",
             "data" : [
                [
@@ -701,9 +706,12 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "039"
          },
          {
+            "name" : "040",
+            "id" : "040",
             "data" : [
                [
                   "Perl",
@@ -717,11 +725,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "040",
-            "name" : "040"
+            ]
          },
          {
+            "name" : "041",
+            "id" : "041",
             "data" : [
                [
                   "Perl",
@@ -735,11 +743,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "041",
-            "id" : "041"
+            ]
          },
          {
+            "name" : "042",
             "data" : [
                [
                   "Perl",
@@ -754,7 +761,6 @@
                   11
                ]
             ],
-            "name" : "042",
             "id" : "042"
          },
          {
@@ -790,10 +796,11 @@
                   11
                ]
             ],
-            "name" : "044",
-            "id" : "044"
+            "id" : "044",
+            "name" : "044"
          },
          {
+            "id" : "045",
             "data" : [
                [
                   "Perl",
@@ -808,12 +815,10 @@
                   11
                ]
             ],
-            "id" : "045",
             "name" : "045"
          },
          {
             "name" : "046",
-            "id" : "046",
             "data" : [
                [
                   "Perl",
@@ -827,9 +832,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "046"
          },
          {
+            "name" : "047",
             "data" : [
                [
                   "Perl",
@@ -844,11 +851,9 @@
                   10
                ]
             ],
-            "id" : "047",
-            "name" : "047"
+            "id" : "047"
          },
          {
-            "name" : "048",
             "id" : "048",
             "data" : [
                [
@@ -863,11 +868,10 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "048"
          },
          {
-            "name" : "049",
-            "id" : "049",
             "data" : [
                [
                   "Perl",
@@ -881,10 +885,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "049",
+            "name" : "049"
          },
          {
-            "name" : "050",
             "id" : "050",
             "data" : [
                [
@@ -899,9 +904,12 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "050"
          },
          {
+            "name" : "051",
+            "id" : "051",
             "data" : [
                [
                   "Perl",
@@ -915,11 +923,10 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "051",
-            "id" : "051"
+            ]
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                [
                   "Perl",
@@ -934,12 +941,11 @@
                   14
                ]
             ],
-            "id" : "052",
-            "name" : "052"
+            "id" : "052"
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             "name" : "053",
+            "id" : "053",
             "data" : [
                [
                   "Perl",
@@ -957,7 +963,6 @@
          },
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-            "name" : "054",
             "data" : [
                [
                   "Perl",
@@ -971,11 +976,10 @@
                   "Blog",
                   18
                ]
-            ]
+            ],
+            "name" : "054"
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-            "name" : "055",
-            "id" : "055",
             "data" : [
                [
                   "Perl",
@@ -989,7 +993,9 @@
                   "Blog",
                   14
                ]
-            ]
+            ],
+            "id" : "055",
+            "name" : "055"
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          {
             "data" : [
@@ -1010,7 +1016,6 @@
             "name" : "056"
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             "name" : "057",
             "data" : [
                [
@@ -1025,9 +1030,11 @@
                   "Blog",
                   15
                ]
-            ]
+            ],
+            "id" : "057"
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+            "name" : "058",
             "data" : [
                [
                   "Perl",
@@ -1042,7 +1049,6 @@
                   13
                ]
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-            "name" : "058",
             "id" : "058"
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          {
@@ -1060,10 +1066,12 @@
                   16
                ]
             ],
-            "name" : "059",
-            "id" : "059"
+            "id" : "059",
+            "name" : "059"
          },
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+            "name" : "060",
+            "id" : "060",
             "data" : [
                [
                   "Perl",
@@ -1077,11 +1085,11 @@
                   "Blog",
                   16
                ]
-            ],
-            "id" : "060",
-            "name" : "060"
+            ]
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+            "name" : "061",
+            "id" : "061",
             "data" : [
                [
                   "Perl",
@@ -1095,13 +1103,11 @@
                   "Blog",
                   14
                ]
-            ],
-            "id" : "061",
-            "name" : "061"
+            ]
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          {
-            "id" : "062",
             "name" : "062",
+            "id" : "062",
             "data" : [
                [
                   "Perl",
@@ -1118,6 +1124,7 @@
             ]
          },
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+            "name" : "063",
             "data" : [
                [
                   "Perl",
@@ -1132,10 +1139,10 @@
                   13
                ]
             ],
-            "name" : "063",
             "id" : "063"
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+            "name" : "064",
             "data" : [
                [
                   "Perl",
@@ -1150,11 +1157,9 @@
                   16
                ]
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-            "name" : "064",
             "id" : "064"
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             "id" : "065",
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                [
@@ -1169,11 +1174,10 @@
                   "Blog",