- Added solutions by Laurent Rosenfeld.

18 files changed, 1386 insertions, 1295 deletions

diff --git a/challenge-122/laurent-rosenfeld/blog.txt b/challenge-122/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..0c616545b8
--- /dev/null
+++ b/challenge-122/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+http://blogs.perl.org/users/laurent_r/2021/07/perl-weekly-challenge-122-average-of-stream-and-basketball-points.html
diff --git a/challenge-122/laurent-rosenfeld/perl/ch-1.pl b/challenge-122/laurent-rosenfeld/perl/ch-1.pl
new file mode 100644
index 0000000000..5b66714669
--- /dev/null
+++ b/challenge-122/laurent-rosenfeld/perl/ch-1.pl
@@ -0,0 +1,10 @@
+use strict;
+use warnings;
+use feature "say";
+
+my @n = (10, 20, 30, 40, 50, 60, 70, 80, 90, 100);
+my @mvg_avg = ($n[0]);
+for my $i (1..9) {
+    $mvg_avg[$i] = ($mvg_avg[$i-1] * $i + $n[$i]) / ($i + 1);
+}
+say "@mvg_avg";
diff --git a/challenge-122/laurent-rosenfeld/perl/ch-2.pl b/challenge-122/laurent-rosenfeld/perl/ch-2.pl
new file mode 100644
index 0000000000..f05f7a444b
--- /dev/null
+++ b/challenge-122/laurent-rosenfeld/perl/ch-2.pl
@@ -0,0 +1,26 @@
+use strict;
+use warnings;
+use feature "say";
+
+my $target = shift // 5;
+my @vals = (1, 2, 3);
+
+sub find_dist  {
+    my ($sum, @seq) = @_;
+    for my $i (@vals) {
+        my $new_sum = $sum + $i;
+        # if $new_sum > $target, then we don't
+        # need to test other values of @vals and
+        # can use return instead of next
+        # since these values are in ascending order
+        return if $new_sum > $target;
+        my @new_seq = (@seq, $i);
+        if ($new_sum == $target) {
+            say ""@new_seq";
+            return;
+        } else {
+            find_dist($new_sum, @new_seq);
+        }
+    }
+}
+find_dist 0, ();
diff --git a/challenge-122/laurent-rosenfeld/raku/ch-1.raku b/challenge-122/laurent-rosenfeld/raku/ch-1.raku
new file mode 100644
index 0000000000..6dc7f29d8e
--- /dev/null
+++ b/challenge-122/laurent-rosenfeld/raku/ch-1.raku
@@ -0,0 +1,8 @@
+use v6;
+
+my @n = 10, 20 ... Inf;
+my @cum_moving_avg = @n[0];
+for 1..^10 -> $i {
+    @cum_moving_avg[$i] = (@cum_moving_avg[$i-1] * $i + @n[$i]) / ($i + 1);
+}
+say ~@cum_moving_avg;
diff --git a/challenge-122/laurent-rosenfeld/raku/ch-2.raku b/challenge-122/laurent-rosenfeld/raku/ch-2.raku
new file mode 100644
index 0000000000..f85c63338a
--- /dev/null
+++ b/challenge-122/laurent-rosenfeld/raku/ch-2.raku
@@ -0,0 +1,23 @@
+use v6;
+
+my $target = @*ARGS[0] // 5;
+my @vals = 1, 2, 3;
+
+sub find-dist ($sum, @seq) {
+    for @vals -> $i {
+        my $new-sum = $sum + $i;
+        # if $new-sum > $target, then we don't
+        # need to test other values of @vals and
+        # can use return directly instead of next
+        # since these values are in ascending order
+        return if $new-sum > $target;
+        my @new-seq = |@seq, $i;
+        if $new-sum == $target {
+            say ~@new-seq;
+            return;
+        } else {
+            find-dist($new-sum, @new-seq);
+        }
+    }
+}
+find-dist 0, ();
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 10f3cf59aa..741763f160 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,120 +1,25 @@
 {
-   "subtitle" : {
-      "text" : "[Champions: 12] Last updated at 2021-07-20 17:05:39 GMT"
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "title" : {
-      "text" : "The Weekly Challenge - 122"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "legend" : {
-      "enabled" : 0
-   },
-   "series" : [
-      {
-         "data" : [
-            {
-               "y" : 2,
-               "drilldown" : "Cheok-Yin Fung",
-               "name" : "Cheok-Yin Fung"
-            },
-            {
-               "name" : "Dave Jacoby",
-               "drilldown" : "Dave Jacoby",
-               "y" : 3
-            },
-            {
-               "y" : 3,
-               "name" : "James Smith",
-               "drilldown" : "James Smith"
-            },
-            {
-               "y" : 4,
-               "drilldown" : "Luca Ferrari",
-               "name" : "Luca Ferrari"
-            },
-            {
-               "drilldown" : "Lucas Ransan",
-               "name" : "Lucas Ransan",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "name" : "Mark Anderson",
-               "drilldown" : "Mark Anderson"
-            },
-            {
-               "drilldown" : "Niels van Dijke",
-               "name" : "Niels van Dijke",
-               "y" : 2
-            },
-            {
-               "name" : "Peter Scott",
-               "drilldown" : "Peter Scott",
-               "y" : 1
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Roger Bell_West",
-               "name" : "Roger Bell_West"
-            },
-            {
-               "y" : 4,
-               "drilldown" : "Stuart Little",
-               "name" : "Stuart Little"
-            },
-            {
-               "drilldown" : "Ulrich Rieke",
-               "name" : "Ulrich Rieke",
-               "y" : 3
-            },
-            {
-               "y" : 3,
-               "name" : "W. Luis Mochan",
-               "drilldown" : "W. Luis Mochan"
-            }
-         ],
-         "name" : "The Weekly Challenge - 122",
-         "colorByPoint" : 1
-      }
-   ],
    "tooltip" : {
-      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
       "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/>"
    },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
-      }
-   },
    "xAxis" : {
       "type" : "category"
    },
    "drilldown" : {
       "series" : [
          {
-            "name" : "Cheok-Yin Fung",
+            "id" : "Cheok-Yin Fung",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Cheok-Yin Fung"
+            "name" : "Cheok-Yin Fung"
          },
          {
-            "name" : "Dave Jacoby",
             "id" : "Dave Jacoby",
             "data" : [
                [
@@ -125,7 +30,8 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Dave Jacoby"
          },
          {
             "data" : [
@@ -138,11 +44,28 @@
                   1
                ]
             ],
-            "id" : "James Smith",
-            "name" : "James Smith"
+            "name" : "James Smith",
+            "id" : "James Smith"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Laurent Rosenfeld",
+            "id" : "Laurent Rosenfeld"
          },
          {
-            "id" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -153,16 +76,17 @@
                   2
                ]
             ],
-            "name" : "Luca Ferrari"
+            "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari"
          },
          {
-            "name" : "Lucas Ransan",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
+            "name" : "Lucas Ransan",
             "id" : "Lucas Ransan"
          },
          {
@@ -176,27 +100,26 @@
             "name" : "Mark Anderson"
          },
          {
-            "name" : "Niels van Dijke",
             "id" : "Niels van Dijke",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Niels van Dijke"
          },
          {
-            "name" : "Peter Scott",
             "id" : "Peter Scott",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "name" : "Peter Scott"
          },
          {
-            "name" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -207,9 +130,11 @@
                   1
                ]
             ],
+            "name" : "Roger Bell_West",
             "id" : "Roger Bell_West"
          },
          {
+            "name" : "Stuart Little",
             "data" : [
                [
                   "Perl",
@@ -220,12 +145,9 @@
                   2
                ]
             ],
-            "id" : "Stuart Little",
-            "name" : "Stuart Little"
+            "id" : "Stuart Little"
          },
          {
-            "name" : "Ulrich Rieke",
-            "id" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
@@ -235,11 +157,11 @@
                   "Raku",
                   1
                ]
-            ]
+            ],
+            "name" : "Ulrich Rieke",
+            "id" : "Ulrich Rieke"
          },
          {
-            "name" : "W. Luis Mochan",
-            "id" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -249,8 +171,109 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "W. Luis Mochan",
+            "id" : "W. Luis Mochan"
          }
       ]
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 122"
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
+   "series" : [
+      {
+         "data" : [
+            {
+               "name" : "Cheok-Yin Fung",
+               "y" : 2,
+               "drilldown" : "Cheok-Yin Fung"
+            },
+            {
+               "name" : "Dave Jacoby",
+               "drilldown" : "Dave Jacoby",
+               "y" : 3
+            },
+            {
+               "drilldown" : "James Smith",
+               "y" : 3,
+               "name" : "James Smith"
+            },
+            {
+               "name" : "Laurent Rosenfeld",
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 5
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "y" : 4,
+               "name" : "Luca Ferrari"
+            },
+            {
+               "drilldown" : "Lucas Ransan",
+               "y" : 2,
+               "name" : "Lucas Ransan"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Mark Anderson",
+               "name" : "Mark Anderson"
+            },
+            {
+               "drilldown" : "Niels van Dijke",
+               "y" : 2,
+               "name" : "Niels van Dijke"
+            },
+            {
+               "drilldown" : "Peter Scott",
+               "y" : 1,
+               "name" : "Peter Scott"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Roger Bell_West",
+               "name" : "Roger Bell_West"
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Stuart Little",
+               "name" : "Stuart Little"
+            },
+            {
+               "name" : "Ulrich Rieke",
+               "drilldown" : "Ulrich Rieke",
+               "y" : 3
+            },
+            {
+               "drilldown" : "W. Luis Mochan",
+               "y" : 3,
+               "name" : "W. Luis Mochan"
+            }
+         ],
+         "name" : "The Weekly Challenge - 122",
+         "colorByPoint" : 1
+      }
+   ],
+   "chart" : {
+      "type" : "column"
+   },
+   "subtitle" : {
+      "text" : "[Champions: 13] Last updated at 2021-07-21 00:57:30 GMT"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 30110526bc..72cbc66c31 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -2,62 +2,62 @@
    "legend" : {
       "enabled" : "false"
    },
-   "series" : [
-      {
-         "name" : "Contributions",
-         "data" : [
-            [
-               "Blog",
-               1739
-            ],
-            [
-               "Perl",
-               5819
-            ],
-            [
-               "Raku",
-               3635
-            ]
-         ],
-         "dataLabels" : {
-            "enabled" : "true",
-            "format" : "{point.y:.0f}",
-            "y" : 10,
-            "color" : "#FFFFFF",
-            "align" : "right",
-            "rotation" : -90,
-            "style" : {
-               "fontFamily" : "Verdana, sans-serif",
-               "fontSize" : "13px"
-            }
-         }
-      }
-   ],
    "tooltip" : {
       "pointFormat" : "<b>{point.y:.0f}</b>"
    },
    "xAxis" : {
+      "type" : "category",
       "labels" : {
          "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
+            "fontFamily" : "Verdana, sans-serif",
+            "fontSize" : "13px"
          }
-      },
-      "type" : "category"
+      }
    },
    "title" : {
       "text" : "The Weekly Challenge Contributions [2019 - 2021]"
    },
+   "subtitle" : {
+      "text" : "Last updated at 2021-07-21 00:57:30 GMT"
+   },
    "yAxis" : {
+      "min" : 0,
       "title" : {
          "text" : null
-      },
-      "min" : 0
+      }
    },
+   "series" : [
+      {
+         "dataLabels" : {
+            "color" : "#FFFFFF",
+            "format" : "{point.y:.0f}",
+            "rotation" : -90,
+            "align" : "right",
+            "style" : {
+               "fontFamily" : "Verdana, sans-serif",
+               "fontSize" : "13px"
+            },
+            "y" : 10,
+            "enabled" : "true"
+         },
+         "name" : "Contributions",
+         "data" : [
+            [
+               "Blog",
+               1740
+            ],
+            [
+               "Perl",
+               5821
+            ],
+            [
+               "Raku",
+               3637
+            ]
+         ]
+      }
+   ],
    "chart" : {
       "type" : "column"
-   },
-   "subtitle" : {
-      "text" : "Last updated at 2021-07-20 17:05:39 GMT"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 6507147965..9e2746b90c 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,23 +1,13 @@
 {
+   "legend" : {
+      "enabled" : "false"
+   },
    "title" : {
       "text" : "The Weekly Challenge Language"
    },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2021-07-20 17:05:39 GMT"
-   },
-   "chart" : {
-      "type" : "column"
-   },
    "drilldown" : {
       "series" : [
          {
-            "name" : "001",
-            "id" : "001",
             "data" : [
                [
                   "Perl",
@@ -31,11 +21,12 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "001",
+            "id" : "001"
          },
          {
             "name" : "002",
-            "id" : "002",
             "data" : [
                [
                   "Perl",
@@ -49,10 +40,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "002"
          },
          {
-            "id" : "003",
+            "name" : "003",
             "data" : [
                [
                   "Perl",
@@ -67,10 +59,9 @@
                   9
                ]
             ],
-            "name" : "003"
+            "id" : "003"
          },
          {
-            "name" : "004",
             "id" : "004",
             "data" : [
                [
@@ -85,7 +76,8 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "004"
          },
          {
             "name" : "005",
@@ -106,6 +98,7 @@
             "id" : "005"
          },
          {
+            "id" : "006",
             "data" : [
                [
                   "Perl",
@@ -120,10 +113,10 @@
                   7
                ]
             ],
-            "id" : "006",
             "name" : "006"
          },
          {
+            "id" : "007",
             "data" : [
                [
                   "Perl",
@@ -138,7 +131,6 @@
                   10
                ]
             ],
-            "id" : "007",
             "name" : "007"
          },
          {
@@ -160,6 +152,7 @@
             "id" : "008"
          },
          {
+            "id" : "009",
             "name" : "009",
             "data" : [
                [
@@ -174,12 +167,10 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "009"
+            ]
          },
          {
             "name" : "010",
-            "id" : "010",
             "data" : [
                [
                   "Perl",
@@ -193,10 +184,10 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "id" : "010"
          },
          {
-            "name" : "011",
             "id" : "011",
             "data" : [
                [
@@ -211,9 +202,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "011"
          },
          {
+            "id" : "012",
             "name" : "012",
             "data" : [
                [
@@ -228,11 +221,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "012"
+            ]
          },
          {
-            "id" : "013",
             "data" : [
                [
                   "Perl",
@@ -247,10 +238,11 @@
                   13
                ]
             ],
-            "name" : "013"
+            "name" : "013",
+            "id" : "013"
          },
          {
-            "id" : "014",
+            "name" : "014",
             "data" : [
                [
                   "Perl",
@@ -265,9 +257,10 @@
                   15
                ]
             ],
-            "name" : "014"
+            "id" : "014"
          },
          {
+            "id" : "015",
             "data" : [
                [
                   "Perl",
@@ -282,10 +275,11 @@
                   15
                ]
             ],
-            "id" : "015",
             "name" : "015"
          },
          {
+            "id" : "016",
+            "name" : "016",
             "data" : [
                [
                   "Perl",
@@ -299,12 +293,10 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "016",
-            "name" : "016"
+            ]
          },
          {
-            "id" : "017",
+            "name" : "017",
             "data" : [
                [
                   "Perl",
@@ -319,9 +311,11 @@
                   12
                ]
             ],
-            "name" : "017"
+            "id" : "017"
          },
          {
+            "id" : "018",
+            "name" : "018",
             "data" : [
                [
                   "Perl",
@@ -335,11 +329,10 @@
                   "Blog",
                   14
                ]
-            ],
-            "id" : "018",
-            "name" : "018"
+            ]
          },
          {
+            "id" : "019",
             "name" : "019",
             "data" : [
                [
@@ -354,8 +347,7 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "019"
+            ]
          },
          {
             "id" : "020",
@@ -377,6 +369,7 @@
          },
          {
             "id" : "021",
+            "name" : "021",
             "data" : [
                [
                   "Perl",
@@ -390,11 +383,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "021"
+            ]
          },
          {
-            "id" : "022",
             "data" : [
                [
                   "Perl",
@@ -409,9 +400,11 @@
                   10
                ]
             ],
-            "name" : "022"
+            "name" : "022",
+            "id" : "022"
          },
          {
+            "id" : "023",
             "data" : [
                [
                   "Perl",
@@ -426,10 +419,10 @@
                   12
                ]
             ],
-            "id" : "023",
             "name" : "023"
          },
          {
+            "id" : "024",
             "data" : [
                [
                   "Perl",
@@ -444,7 +437,6 @@
                   11
                ]
             ],
-            "id" : "024",
             "name" : "024"
          },
          {
@@ -462,10 +454,11 @@
                   12
                ]
             ],
-            "id" : "025",
-            "name" : "025"
+            "name" : "025",
+            "id" : "025"
          },
          {
+            "id" : "026",
             "data" : [
                [
                   "Perl",
@@ -480,11 +473,9 @@
                   10
                ]
             ],
-            "id" : "026",
             "name" : "026"
          },
          {
-            "name" : "027",
             "data" : [
                [
                   "Perl",
@@ -499,9 +490,11 @@
                   9
                ]
             ],
+            "name" : "027",
             "id" : "027"
          },
          {
+            "id" : "028",
             "name" : "028",
             "data" : [
                [
@@ -516,11 +509,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "028"
+            ]
          },
          {
-            "id" : "029",
+            "name" : "029",
             "data" : [
                [
                   "Perl",
@@ -535,11 +527,11 @@
                   12
                ]
             ],
-            "name" : "029"
+            "id" : "029"
          },
          {
-            "name" : "030",
             "id" : "030",
+            "name" : "030",
             "data" : [
                [
                   "Perl",
@@ -556,6 +548,8 @@
             ]
          },
          {
+            "id" : "031",
+            "name" : "031",
             "data" : [
                [
                   "Perl",
@@ -569,11 +563,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "031",
-            "name" : "031"
+            ]
          },
          {
+            "id" : "032",
             "data" : [
                [
                   "Perl",
@@ -588,10 +581,11 @@
                   10
                ]
             ],
-            "id" : "032",
             "name" : "032"
          },
          {
+            "id" : "033",
+            "name" : "033",
             "data" : [
                [
                   "Perl",
@@ -605,11 +599,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "033",
-            "name" : "033"
+            ]
          },
          {
+            "id" : "034",
+            "name" : "034",
             "data" : [
                [
                   "Perl",
@@ -623,12 +617,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "034",
-            "name" : "034"
+            ]
          },
          {
-            "name" : "035",
             "data" : [
                [
                   "Perl",
@@ -643,11 +634,10 @@
                   9
                ]
             ],
+            "name" : "035",
             "id" : "035"
          },
          {
-            "name" : "036",
-            "id" : "036",
             "data" : [
                [
                   "Perl",
@@ -661,11 +651,12 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "036",
+            "id" : "036"
          },
          {
             "name" : "037",
-            "id" : "037",
             "data" : [
                [
                   "Perl",
@@ -679,9 +670,11 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "id" : "037"
          },
          {
+            "id" : "038",
             "name" : "038",
             "data" : [
                [
@@ -696,8 +689,7 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "038"
+            ]
          },
          {
             "data" : [
@@ -714,8 +706,8 @@
                   12
                ]
             ],
-            "id" : "039",
-            "name" : "039"
+            "name" : "039",
+            "id" : "039"
          },
          {
             "data" : [
@@ -732,10 +724,11 @@
                   10