From f784bb5ee8f95134c6dbd9a85511c5f272fdfccb Mon Sep 17 00:00:00 2001
From: arnesom <arne@bbop.org>
Date: Sat, 7 Sep 2024 20:57:43 +0200
Subject: Arne Sommer

---
 challenge-285/arne-sommer/blog.txt                |  1 +
 challenge-285/arne-sommer/raku/ch-1.raku          | 25 +++++++++
 challenge-285/arne-sommer/raku/ch-2.raku          | 68 +++++++++++++++++++++++
 challenge-285/arne-sommer/raku/making-change      | 55 ++++++++++++++++++
 challenge-285/arne-sommer/raku/making-change-last | 68 +++++++++++++++++++++++
 challenge-285/arne-sommer/raku/no-connection      | 25 +++++++++
 6 files changed, 242 insertions(+)
 create mode 100644 challenge-285/arne-sommer/blog.txt
 create mode 100755 challenge-285/arne-sommer/raku/ch-1.raku
 create mode 100755 challenge-285/arne-sommer/raku/ch-2.raku
 create mode 100755 challenge-285/arne-sommer/raku/making-change
 create mode 100755 challenge-285/arne-sommer/raku/making-change-last
 create mode 100755 challenge-285/arne-sommer/raku/no-connection

diff --git a/challenge-285/arne-sommer/blog.txt b/challenge-285/arne-sommer/blog.txt
new file mode 100644
index 0000000000..563ffcf0db
--- /dev/null
+++ b/challenge-285/arne-sommer/blog.txt
@@ -0,0 +1 @@
+https://raku-musings.com/no-connection.html
diff --git a/challenge-285/arne-sommer/raku/ch-1.raku b/challenge-285/arne-sommer/raku/ch-1.raku
new file mode 100755
index 0000000000..d55e3a25d0
--- /dev/null
+++ b/challenge-285/arne-sommer/raku/ch-1.raku
@@ -0,0 +1,25 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@routes where @routes.elems > 0, :v(:$verbose));
+
+my %outgoing;
+
+for @routes -> $route
+{
+  my ($from, $to) = $route.split(/\s+/);
+
+  say ": Route from '$from' to '$to'" if $verbose;
+
+  %outgoing{$from}++;
+  %outgoing{$to} = 0 unless defined %outgoing{$to};
+}
+
+if $verbose
+{
+  for sort keys %outgoing -> $key
+  {
+    say ": '$key' has %outgoing{$key} outgoing connectiuon(s)" if $verbose;
+  }
+}
+
+say %outgoing.grep( *.value == 0 )>>.key.join(", ");
diff --git a/challenge-285/arne-sommer/raku/ch-2.raku b/challenge-285/arne-sommer/raku/ch-2.raku
new file mode 100755
index 0000000000..d99bfd95c5
--- /dev/null
+++ b/challenge-285/arne-sommer/raku/ch-2.raku
@@ -0,0 +1,68 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (UInt $amount, :v(:$verbose));
+
+my %value;
+
+%value<penny>       =  1;
+%value<nickel>      =  5;
+%value<dime>        = 10;
+%value<quarter>     = 25;
+%value<half-dollar> = 50;
+
+my $ok = 0;
+
+for 0 .. $amount -> $penny
+{
+  my $sum-p = $penny * %value<penny>;
+
+  for 0 .. $amount -> $nickel
+  {
+    my $sum-pn = $sum-p + $nickel * %value<nickel>;
+
+    last if $sum-pn > $amount;
+ 
+    for 0 .. $amount -> $dime
+    {
+      my $sum-pnd = $sum-pn + $dime * %value<dime>;
+
+      last if $sum-pnd > $amount;
+
+      for 0 .. $amount -> $quarter
+      {
+        my $sum-pndq = $sum-pnd + $quarter * %value<quarter>;
+
+        last if $sum-pndq > $amount;
+
+        for 0 .. $amount -> $half-dollar
+        {
+          my $sum = $sum-pndq + $half-dollar * %value<half-dollar>;
+
+          last if $sum > $amount;
+
+          if $sum == $amount
+	  {
+	    $ok++;
+	    say ": " ~
+	    (
+	      prettyish($penny,       'P'),
+              prettyish($nickel,      'N'),
+	      prettyish($dime,        'D'),
+	      prettyish($quarter,     'Q'),
+	      prettyish($half-dollar, 'HD')
+            ).grep( *.defined ).join(" + ") if $verbose;
+	  }
+	}
+      }
+    }
+  }
+}
+
+sub prettyish ($value, $letter)
+{
+  return unless $value;
+  return $letter if $value == 1;
+  return "$value$letter";
+}
+
+say $ok;
diff --git a/challenge-285/arne-sommer/raku/making-change b/challenge-285/arne-sommer/raku/making-change
new file mode 100755
index 0000000000..927ba48fdb
--- /dev/null
+++ b/challenge-285/arne-sommer/raku/making-change
@@ -0,0 +1,55 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (UInt $amount, :v(:$verbose));
+
+my %value;
+
+%value<penny>       =  1;
+%value<nickel>      =  5;
+%value<dime>        = 10;
+%value<quarter>     = 25;
+%value<half-dollar> = 50;
+
+my $ok = 0;
+
+for 0 .. $amount -> $penny
+{
+  for 0 .. $amount div %value<nickel> -> $nickel
+  {
+    for 0 .. $amount div %value<dime> -> $dime
+    {
+      for 0 .. $amount div %value<quarter> -> $quarter
+      {
+        for 0 .. $amount div %value<half-dollar> -> $half-dollar
+        {
+	  if $amount ==
+	    $penny +
+	    $nickel      * %value<nickel> +
+	    $dime        * %value<dime> +
+	    $quarter     * %value<quarter> +
+	    $half-dollar * %value<half-dollar>
+	  {
+	    $ok++;
+	    say ": " ~
+	    (
+	      prettyish($penny,       'P'),
+              prettyish($nickel,      'N'),
+	      prettyish($dime,        'D'),
+	      prettyish($quarter,     'Q'),
+	      prettyish($half-dollar, 'HD')
+            ).grep( *.defined ).join(" + ") if $verbose;
+	  }
+	}
+      }
+    }
+  }
+}
+
+sub prettyish ($value, $letter)
+{
+  return unless $value;
+  return $letter if $value == 1;
+  return "$value$letter";
+}
+
+say $ok;
diff --git a/challenge-285/arne-sommer/raku/making-change-last b/challenge-285/arne-sommer/raku/making-change-last
new file mode 100755
index 0000000000..d99bfd95c5
--- /dev/null
+++ b/challenge-285/arne-sommer/raku/making-change-last
@@ -0,0 +1,68 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (UInt $amount, :v(:$verbose));
+
+my %value;
+
+%value<penny>       =  1;
+%value<nickel>      =  5;
+%value<dime>        = 10;
+%value<quarter>     = 25;
+%value<half-dollar> = 50;
+
+my $ok = 0;
+
+for 0 .. $amount -> $penny
+{
+  my $sum-p = $penny * %value<penny>;
+
+  for 0 .. $amount -> $nickel
+  {
+    my $sum-pn = $sum-p + $nickel * %value<nickel>;
+
+    last if $sum-pn > $amount;
+ 
+    for 0 .. $amount -> $dime
+    {
+      my $sum-pnd = $sum-pn + $dime * %value<dime>;
+
+      last if $sum-pnd > $amount;
+
+      for 0 .. $amount -> $quarter
+      {
+        my $sum-pndq = $sum-pnd + $quarter * %value<quarter>;
+
+        last if $sum-pndq > $amount;
+
+        for 0 .. $amount -> $half-dollar
+        {
+          my $sum = $sum-pndq + $half-dollar * %value<half-dollar>;
+
+          last if $sum > $amount;
+
+          if $sum == $amount
+	  {
+	    $ok++;
+	    say ": " ~
+	    (
+	      prettyish($penny,       'P'),
+              prettyish($nickel,      'N'),
+	      prettyish($dime,        'D'),
+	      prettyish($quarter,     'Q'),
+	      prettyish($half-dollar, 'HD')
+            ).grep( *.defined ).join(" + ") if $verbose;
+	  }
+	}
+      }
+    }
+  }
+}
+
+sub prettyish ($value, $letter)
+{
+  return unless $value;
+  return $letter if $value == 1;
+  return "$value$letter";
+}
+
+say $ok;
diff --git a/challenge-285/arne-sommer/raku/no-connection b/challenge-285/arne-sommer/raku/no-connection
new file mode 100755
index 0000000000..d55e3a25d0
--- /dev/null
+++ b/challenge-285/arne-sommer/raku/no-connection
@@ -0,0 +1,25 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@routes where @routes.elems > 0, :v(:$verbose));
+
+my %outgoing;
+
+for @routes -> $route
+{
+  my ($from, $to) = $route.split(/\s+/);
+
+  say ": Route from '$from' to '$to'" if $verbose;
+
+  %outgoing{$from}++;
+  %outgoing{$to} = 0 unless defined %outgoing{$to};
+}
+
+if $verbose
+{
+  for sort keys %outgoing -> $key
+  {
+    say ": '$key' has %outgoing{$key} outgoing connectiuon(s)" if $verbose;
+  }
+}
+
+say %outgoing.grep( *.value == 0 )>>.key.join(", ");
-- 
cgit