- Added solutions by Robert DiCicco.

- Added solutions by Mark Anderson.
- Added solutions by Andrew Shitov.
- Added solutions by Simon Proctor.
- Added solutions by Luca Ferrari.
- Added solutions by David Ferrone.
- Added solutions by Thomas Kohler.
- Added solutions by Robbie Hatley.
- Added solutions by Ali Moradi.
- Added solutions by W. Luis Mochan.
- Added solutions by E. Choroba.
- Added solutions by Roger Bell_West.
- Added solutions by Peter Campbell Smith.

25 files changed, 3543 insertions, 2748 deletions

diff --git a/challenge-227/eric-cheung/python/ch-1.py b/challenge-227/eric-cheung/python/ch-1.py
new file mode 100755
index 0000000000..1286f37671
--- /dev/null
+++ b/challenge-227/eric-cheung/python/ch-1.py
@@ -0,0 +1,13 @@
+

+from datetime import datetime

+

+nYearGiven = 2023  ## Example

+

+nFri_13th_Count = len([nMonthLoop + 1 for nMonthLoop in range(12) if int(datetime(nYearGiven, nMonthLoop + 1, 13).strftime("%w")) == 5])

+

+## for nMonthLoop in range(12):

+    ## strWeekDay = datetime(nYearGiven, nMonthLoop + 1, 13).strftime("%w")

+    ## if int(strWeekDay) == 5:

+        ## nFri_13th_Count = nFri_13th_Count + 1

+

+print (nFri_13th_Count)

diff --git a/challenge-227/eric-cheung/python/ch-2.py b/challenge-227/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..ce59ffaa51
--- /dev/null
+++ b/challenge-227/eric-cheung/python/ch-2.py
@@ -0,0 +1,53 @@
+

+import roman

+

+nMaxLimit = 3999

+

+def GetRomanArithOper (strInput):

+

+    global nMaxLimit

+

+    arrElem = strInput.split()

+    nInt_01 = roman.fromRoman(arrElem[0])

+    strOperator = arrElem[1]

+    nInt_02 = roman.fromRoman(arrElem[2])

+

+    if strOperator == "+":

+        if nInt_01 + nInt_02 > nMaxLimit:

+            return "non potest"

+        return roman.toRoman(nInt_01 + nInt_02)

+

+    if strOperator == "-":

+        if nInt_01 > nInt_02:

+            return roman.toRoman(nInt_01 - nInt_02)

+        if nInt_01 == nInt_02:

+            return "nulla"

+        return "non potest"

+

+    if strOperator == "/":

+        if nInt_01 % nInt_02 == 0:

+            return roman.toRoman(int(nInt_01 / nInt_02))

+        return "non potest"

+

+    if strOperator == "*":

+        if nInt_01 * nInt_02 > nMaxLimit:

+            return "non potest"

+        return roman.toRoman(nInt_01 * nInt_02)

+

+    if strOperator == "**":

+        if nInt_01 ** nInt_02 > nMaxLimit:

+            return "non potest"

+        return roman.toRoman(nInt_01 ** nInt_02)

+

+

+## strGivenExpr = "IV + V"

+## strGivenExpr = "M - I"

+## strGivenExpr = "X / II"

+## strGivenExpr = "XI * VI"

+## strGivenExpr = "VII ** III"

+## strGivenExpr = "V - V"

+## strGivenExpr = "V / II"

+## strGivenExpr = "MMM + M"

+strGivenExpr = "V - X"

+

+print (GetRomanArithOper(strGivenExpr))

diff --git a/challenge-227/robert-dicicco/julia/ch-1.jl b/challenge-227/robert-dicicco/julia/ch-1.jl
new file mode 100644
index 0000000000..66374918fb
--- /dev/null
+++ b/challenge-227/robert-dicicco/julia/ch-1.jl
@@ -0,0 +1,56 @@
+#!/usr/bin/env julia
+#=
+-------------------------------------
+AUTHOR: Robert DiCicco
+DATE  : 2023-07-24
+Challenge 227 Task 1 Friday 13th ( Julia )
+-------------------------------------
+=#
+using Printf
+using Dates
+
+function checkArgs(args)
+  global year
+  try
+    year = parse(Int64, args[1])
+  catch
+    println("Please enter a year between 1753 and 9999")
+    exit(0)
+  finally
+    if year < 1753 || year > 9999
+      println("Please enter a year between 1753 and 9999")
+      exit(0)
+    else
+      main(year)
+    end
+  end
+end
+
+function main(year)
+  for month in 1:12
+    d = Dates.Date(year,month,13)
+    wd = Dates.dayofweek(d)
+    if wd == 5      ### 5 is Friday
+        @printf("%d %d 13 is a Friday\n",year, month)
+    end
+  end
+end
+
+checkArgs(ARGS)
+
+#=
+-------------------------------------
+SAMPLE OUTPUT
+julia .\Friday13.jl 2023
+
+2023 1 13 is a Friday
+2023 10 13 is a Friday
+
+julia .\Friday13.jl 1753
+
+1753 4 13 is a Friday
+1753 7 13 is a Friday
+-------------------------------------
+=#
+
+
diff --git a/challenge-227/robert-dicicco/perl/ch-1.pl b/challenge-227/robert-dicicco/perl/ch-1.pl
new file mode 100644
index 0000000000..4bd275dc5c
--- /dev/null
+++ b/challenge-227/robert-dicicco/perl/ch-1.pl
@@ -0,0 +1,44 @@
+#!/usr/bin/env perl
+=begin comment
+-------------------------------------
+AUTHOR: Robert DiCicco
+DATE  : 2023-07-24
+Challenge 227 Task 1 Fridat 13th ( Perl )
+-------------------------------------
+=cut
+use v5.38;
+use strict;
+use warnings;
+use Date::Calc qw/Day_of_Week/;
+
+if (($#ARGV == -1) or ($ARGV[0] < 1753 or $ARGV[0] > 9999)) {
+    say "Please supply a year between 1753 and 9999";
+    exit;
+}
+my $year = $ARGV[0];
+my $month = 1;
+my $day = 1;
+while ($month <= 12){
+    my $dow = Day_of_Week($year,$month,13);
+    if ($dow == 5) {
+        say "$year $month 13 : was a Friday";
+    }
+    $month++;
+}
+
+=begin comment
+-------------------------------------
+SAMPLE OUTPUT
+perl .\Friday13.pl 2023
+
+2023 1 13 : was a Friday
+2023 10 13 : was a Friday
+
+perl .\Friday13.pl 1753
+
+1753 4 13 : was a Friday
+1753 7 13 : was a Friday
+-------------------------------------
+=cut
+
+
diff --git a/challenge-227/robert-dicicco/perl/ch-2.pl b/challenge-227/robert-dicicco/perl/ch-2.pl
new file mode 100644
index 0000000000..dd5d5f4ccc
--- /dev/null
+++ b/challenge-227/robert-dicicco/perl/ch-2.pl
@@ -0,0 +1,94 @@
+#!/usr/bin/env perl
+=begin comment
+--------------------------------------
+AUTHOR: Robert DiCicco
+DATE  : 2023-07-25
+Challenge 227 Task 2 Roman Maths ( Perl )
+--------------------------------------
+=cut
+use strict;
+use warnings;
+use v5.38;
+use Math::Roman qw/tokens roman /;
+
+my $problem = $ARGV[0];
+
+my @parts = split(" ",$problem);
+
+my $left = $parts[0];
+my $op = $parts[1];
+my $right = $parts[2];
+### added tokens for 4, 9, 40, 90, 400, and 900
+Math::Roman::tokens( qw(I 1  IV 4  V 5  IX 9 X 10  XL 40 L 50  XC 90 C 100  XD 400 D 500  CM 900 M 1000 ));
+
+my $lft = Math::Roman::roman($left);  # convert ascii arg to roman numeral
+$lft = $lft->as_number();             # and convert it to an arabic number for use in math
+my $rt = Math::Roman::roman($right);
+$rt = $rt->as_number();
+
+if ($lft - $rt == 0) {
+    print("$left $op $right est nulla\n");
+    exit;
+}
+if ($op eq '/' and ($lft % $rt) > 0 ) {
+    print("$left $op $right non potest\n");
+    exit;
+}
+if ($lft + $rt > 3999) {
+    print("$left $op $right non potest\n");
+    exit;
+}
+if ($op eq '-' and ($lft - $rt < 0)) {
+    print("$left $op $right non potest\n");
+    exit;
+}
+
+my $val = 0;
+if ( $op eq '+') {
+    $val = roman($lft + $rt);
+} elsif ( $op eq '-') {
+    $val = roman($lft - $rt);
+} elsif ($op eq '/') {
+    $val = roman($lft / $rt);
+} elsif ($op eq '*') {
+    $val = roman($lft * $rt);
+} elsif ($op eq '**') {
+    $val = roman($lft ** $rt);
+}
+
+print("$left $op $right => $val\n");
+
+=begin comment
+--------------------------------------
+SAMPLE OUTPUT
+perl .\RomanMath.pl "IV + V"
+IV + V => IX
+
+perl .\RomanMath.pl "M - I"
+M - I => CMXCIX
+
+perl .\RomanMath.pl "X / II"
+X / II => V
+
+perl .\RomanMath.pl "XI * VI"
+XI * VI => LXVI
+
+perl .\RomanMath.pl "VII ** III"
+VII ** III => CCCXLIII
+
+perl .\RomanMath.pl "V - V"
+V - V est nulla
+
+perl .\RomanMath.pl "V / II"
+V / II non potest
+
+perl .\RomanMath.pl "MMM + M"
+MMM + M non potest
+
+perl .\RomanMath.pl "V - X"
+V - X non potest
+--------------------------------------
+=cut
+
+
+
diff --git a/challenge-227/robert-dicicco/python/ch-1.py b/challenge-227/robert-dicicco/python/ch-1.py
new file mode 100644
index 0000000000..20c8ed326e
--- /dev/null
+++ b/challenge-227/robert-dicicco/python/ch-1.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+'''
+-------------------------------------
+AUTHOR: Robert DiCicco
+DATE  : 2023-07-24
+Challenge 227 Task 1 Friday 13th ( Python )
+-------------------------------------
+'''
+
+from datetime import date
+import sys
+
+n = len(sys.argv)
+if n == 1:
+    print("Please select a year between 1753 and 9999")
+    sys.exit(0)
+
+year = int(sys.argv[1])
+if year < 1753 or year > 9999:
+    print("Please select a year between 1753 and 9999")
+    sys.exit(0)
+
+for month in range(1,12):
+    d = date(year, month, 13)
+    wd = d.weekday()
+    if wd == 4:   # Monday = 0, Sunday = 6
+        print(f"{year} {month} 13 is a Friday")
+    month += 1
+
+'''
+-------------------------------------
+SAMPLE OUTPUT
+python .\Friday13.py 2023
+
+2023 1 13 is a Friday
+2023 10 13 is a Friday
+
+python .\Friday13.py 1753
+
+1753 4 13 is a Friday
+1753 7 13 is a Friday
+-------------------------------------
+'''
+
+
+
+
+
+
+
+
+
diff --git a/challenge-227/robert-dicicco/raku/ch-1.raku b/challenge-227/robert-dicicco/raku/ch-1.raku
new file mode 100644
index 0000000000..e2a9203bff
--- /dev/null
+++ b/challenge-227/robert-dicicco/raku/ch-1.raku
@@ -0,0 +1,52 @@
+#!/usr/bin env raku
+=begin comment
+-------------------------------------
+AUTHOR: Robert DiCicco
+DATE  : 2023-07-24
+Challenge 227 Task 1 Fridat 13th ( Raku )
+-------------------------------------
+=end comment
+use v6;
+
+my $year = 0;
+
+if @*ARGS == 0 {
+   say "Please supply a year between 1753 and 9999";
+   exit(1);
+}
+
+for @*ARGS -> $arg {
+  if (( $arg < 1753 ) || ( $arg > 9999 )) {
+    say "Please supply a year between 1753 and 9999";
+    exit(1);
+  }
+  $year = $arg;
+}
+
+my $month = 1;
+while $month <= 12 {
+    my $d = Date.new($year, $month, 13);
+    if $d.day-of-week == 5 {
+        say "$year $month 13 : was a Friday";
+    }
+    $month++;
+}
+
+=begin comment
+-------------------------------------
+SAMPLE OUTPUT
+
+raku .\Friday13.rk 2023
+
+2023 1 13 : was a Friday
+2023 10 13 : was a Friday
+
+raku .\Friday13.rk 1753
+
+1753 4 13 : was a Friday
+1753 7 13 : was a Friday
+
+-------------------------------------
+=end comment
+
+
diff --git a/challenge-227/robert-dicicco/raku/ch-2.raku b/challenge-227/robert-dicicco/raku/ch-2.raku
new file mode 100644
index 0000000000..d041c648d8
--- /dev/null
+++ b/challenge-227/robert-dicicco/raku/ch-2.raku
@@ -0,0 +1,88 @@
+#!/usr/bin/env raku
+=begin comment
+--------------------------------------
+AUTHOR: Robert DiCicco
+DATE  : 2023-07-25
+Challenge 227 Task 2 Roman Maths ( Raku )
+--------------------------------------
+=end comment
+use v6;
+use Math::Roman;
+
+my ($left,$right, $op);
+
+if @*ARGS == 0 {
+   say "Please enter a math problem using Roman numerals";
+   exit(1);
+}
+
+for @*ARGS -> $problem {
+    my @parts = $problem.split(" ");
+    $left = @parts[0];
+    $op = @parts[1];
+    $right = @parts[2];
+}
+
+my $lft = to-arabic($left);
+my $rt = to-arabic($right);
+
+if ($lft - $rt == 0) {
+    print("$left $op $right est nulla\n");
+    exit;
+} elsif ($op eq '/' and ($lft % $rt) > 0 ) {
+    print("$left $op $right non potest\n");
+    exit;
+} elsif ($lft + $rt > 3999) {
+    print("$left $op $right non potest\n");
+    exit;
+} elsif ($op eq '-' and ($lft - $rt < 0)) {
+    print("$left $op $right non potest\n");
+    exit;
+}
+
+if ( $op eq '+') {
+    say "$left + $right => ",($lft + $rt)R;
+} elsif ($op eq '-') {
+    say "$left - $right => ",($lft - $rt)R;
+} elsif ($op eq '/') {
+    say "$left / $right => ",($lft div $rt)R;
+} elsif ($op eq '*') {
+    say "$left * $right => ",($lft * $rt)R;
+} elsif ($op eq '**') {
+    say "$left ** $right => ",($lft ** $rt)R;
+}
+
+=begin comment
+--------------------------------------
+SAMPLE OUTPUT
+raku .\RomanMath.rk "IV + V"
+IV + V => IX
+
+raku .\RomanMath.rk "M - I"
+M - I => CMXCIX
+
+raku .\RomanMath.rk "X / II"
+X / II => V
+
+raku .\RomanMath.rk "XI * VI"
+XI * VI => LXVI
+
+raku .\RomanMath.rk "VII ** III"
+VII ** III => CCCXLIII
+
+raku .\RomanMath.rk "V - V"
+V - V est nulla
+
+raku .\RomanMath.rk "V / II"
+V / II non potest
+
+raku .\RomanMath.rk "MMM + M"
+MMM + M non potest
+
+raku .\RomanMath.rk "V - X"
+V - X non potest
+--------------------------------------
+=end comment
+
+
+
diff --git a/challenge-227/robert-dicicco/ruby/ch-1.rb b/challenge-227/robert-dicicco/ruby/ch-1.rb
new file mode 100644
index 0000000000..d7e67cc998
--- /dev/null
+++ b/challenge-227/robert-dicicco/ruby/ch-1.rb
@@ -0,0 +1,41 @@
+#!/usr/bin/env ruby
+=begin
+-------------------------------------
+AUTHOR: Robert DiCicco
+DATE  : 2023-07-24
+Challenge 227 Task 1 Fridat 13th ( Ruby )
+-------------------------------------
+=end
+require 'date'
+
+year = ARGV[0].to_i
+if year < 1753 || year > 9999
+    puts("Please supply a year between 1753 and 9999")
+    exit
+end
+
+month = 1
+while month <= 12
+    d = Date.new(year,month,13).wday
+    if d == 5
+        puts("#{year} #{month} 13  is a Friday")
+    end
+    month += 1
+end
+
+=begin
+-------------------------------------
+SAMPLE OUTPUT
+ruby .\Friday13.rb 2023
+
+2023 1 13  is a Friday
+2023 10 13  is a Friday
+
+ruby .\Friday13.rb 1753
+
+1753 4 13  is a Friday
+1753 7 13  is a Friday
+-------------------------------------
+=end
+
+
diff --git a/stats/pwc-challenge-226.json b/stats/pwc-challenge-226.json
new file mode 100644
index 0000000000..f91238b23a
--- /dev/null
+++ b/stats/pwc-challenge-226.json
@@ -0,0 +1,684 @@
+{
+   "xAxis" : {
+      "type" : "category"
+   },
+   "subtitle" : {
+      "text" : "[Champions: 36] Last updated at 2023-07-25 23:36:03 GMT"
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "series" : [
+      {
+         "name" : "The Weekly Challenge - 226",
+         "data" : [
+            {
+               "name" : "Adam Russell",
+               "y" : 4,
+               "drilldown" : "Adam Russell"
+            },
+            {
+               "drilldown" : "Adriaan Dens",
+               "y" : 2,
+               "name" : "Adriaan Dens"
+            },
+            {
+               "name" : "Ali Moradi",
+               "y" : 4,
+               "drilldown" : "Ali Moradi"
+            },
+            {
+               "drilldown" : "Andreas Voegele",
+               "name" : "Andreas Voegele",
+               "y" : 2
+            },
+            {
+               "y" : 3,
+               "name" : "Arne Sommer",
+               "drilldown" : "Arne Sommer"
+            },
+            {
+               "name" : "Athanasius",
+               "y" : 4,
+               "drilldown" : "Athanasius"
+            },
+            {
+               "drilldown" : "Avery Adams",
+               "y" : 1,
+               "name" : "Avery Adams"
+            },
+            {
+               "y" : 4,
+               "name" : "BarrOff",
+               "drilldown" : "BarrOff"
+            },
+            {
+               "y" : 3,
+               "name" : "Bob Lied",
+               "drilldown" : "Bob Lied"
+            },
+            {
+               "drilldown" : "Bruce Gray",
+               "y" : 2,
+               "name" : "Bruce Gray"
+            },
+            {
+               "y" : 2,
+               "name" : "Cheok-Yin Fung",
+               "drilldown" : "Cheok-Yin Fung"
+            },
+            {
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby",
+               "y" : 3
+            },
+            {
+               "drilldown" : "David Ferrone",
+               "y" : 2,
+               "name" : "David Ferrone"
+            },
+            {
+               "drilldown" : "E. Choroba",
+               "name" : "E. Choroba",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Flavio Poletti",
+               "name" : "Flavio Poletti",
+               "y" : 6
+            },
+            {
+               "name" : "Jaldhar H. Vyas",
+               "y" : 5,
+               "drilldown" : "Jaldhar H. Vyas"
+            },
+            {
+               "drilldown" : "Jan Krnavek",
+               "name" : "Jan Krnavek",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Jorg Sommrey",
+               "y" : 2,
+               "name" : "Jorg Sommrey"
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "Laurent Rosenfeld",
+               "y" : 6
+            },
+            {
+               "drilldown" : "Lubos Kolouch",
+               "y" : 2,
+               "name" : "Lubos Kolouch"
+            },
+            {
+               "name" : "Luca Ferrari",
+               "y" : 8,
+               "drilldown" : "Luca Ferrari"
+            },
+            {
+               "drilldown" : "Mark Anderson",
+               "y" : 2,
+               "name" : "Mark Anderson"
+            },
+            {
+               "drilldown" : "Matthew Neleigh",
+               "y" : 2,
+               "name" : "Matthew Neleigh"
+            },
+            {
+               "drilldown" : "Niels van Dijke",
+               "name" : "Niels van Dijke",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Packy Anderson",
+               "y" : 4,
+               "name" : "Packy Anderson"
+            },
+            {
+               "drilldown" : "Peter Campbell Smith",
+               "name" : "Peter Campbell Smith",
+               "y" : 3
+            },
+            {
+               "name" : "PokGoPun",
+               "y" : 2,
+               "drilldown" : "PokGoPun"
+            },
+            {
+               "drilldown" : "Robbie Hatley",
+               "name" : "Robbie Hatley",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Robert DiCicco",
+               "y" : 4,
+               "name" : "Robert DiCicco"
+            },
+            {
+               "drilldown" : "Robert Ransbottom",
+               "y" : 2,
+               "name" : "Robert Ransbottom"
+            },
+            {
+               "name" : "Roger Bell_West",
+               "y" : 5,
+               "drilldown" : "Roger Bell_West"
+            },
+            {
+               "drilldown" : "Simon Green",
+               "y" : 3,
+               "name" : "Simon Green"
+            },
+            {
+               "y" : 2,
+               "name" : "Steven Wilson",
+               "drilldown" : "Steven Wilson"
+            },
+            {
+               "name" : "Thomas Kohler",
+               "y" : 4,
+               "drilldown" : "Thomas Kohler"
+            },
+            {
+               "drilldown" : "Ulrich Rieke",
+               "name" : "Ulrich Rieke",
+               "y" : 4
+            },
+            {
+               "drilldown" : "W. Luis Mochan",
+               "name" : "W. Luis Mochan",
+               "y" : 3
+            }
+         ],
+         "colorByPoint" : 1
+      }
+   ],
+   "title" : {
+      "text" : "The Weekly Challenge - 226"
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "drilldown" : {
+      "series" : [
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "id" : "Adam Russell",
+            "name" : "Adam Russell"
+         },
+         {
+            "name" : "Adriaan Dens",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Adriaan Dens"
+         },
+         {
+            "name" : "Ali Moradi",
+            "id" : "Ali Moradi",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Andreas Voegele",
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