PWC 333

Task 1 Raku done
Task 2 Raku done

Task 1 PL/Perl done
Task 2 PL/Perl done

Task 1 PL/PgSQL done
Task 2 PL/PgSQL done

Task 1 PL/Java done
Task 2 PL/Java done

Task 1 Python done
Task 2 Python done

21 files changed, 418 insertions, 3 deletions

diff --git a/challenge-333/luca-ferrari/blog-1.txt b/challenge-333/luca-ferrari/blog-1.txt
new file mode 100644
index 0000000000..7155cf96d0
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-1.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task1
diff --git a/challenge-333/luca-ferrari/blog-10.txt b/challenge-333/luca-ferrari/blog-10.txt
new file mode 100644
index 0000000000..59692f75f9
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-10.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task2pljava
diff --git a/challenge-333/luca-ferrari/blog-2.txt b/challenge-333/luca-ferrari/blog-2.txt
new file mode 100644
index 0000000000..4a82d9c039
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-2.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task2
diff --git a/challenge-333/luca-ferrari/blog-3.txt b/challenge-333/luca-ferrari/blog-3.txt
new file mode 100644
index 0000000000..7444d1e87b
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-3.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task1plperl
diff --git a/challenge-333/luca-ferrari/blog-4.txt b/challenge-333/luca-ferrari/blog-4.txt
new file mode 100644
index 0000000000..8a57af40be
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-4.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task2plperl
diff --git a/challenge-333/luca-ferrari/blog-5.txt b/challenge-333/luca-ferrari/blog-5.txt
new file mode 100644
index 0000000000..88a90a7a7c
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-5.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task1plpgsql
diff --git a/challenge-333/luca-ferrari/blog-6.txt b/challenge-333/luca-ferrari/blog-6.txt
new file mode 100644
index 0000000000..a1b18e5556
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-6.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task2plpgsql
diff --git a/challenge-333/luca-ferrari/blog-7.txt b/challenge-333/luca-ferrari/blog-7.txt
new file mode 100644
index 0000000000..9e0833b297
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-7.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task1python
diff --git a/challenge-333/luca-ferrari/blog-8.txt b/challenge-333/luca-ferrari/blog-8.txt
new file mode 100644
index 0000000000..69f1af3edc
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-8.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task2python
diff --git a/challenge-333/luca-ferrari/blog-9.txt b/challenge-333/luca-ferrari/blog-9.txt
new file mode 100644
index 0000000000..2c86f0057b
--- /dev/null
+++ b/challenge-333/luca-ferrari/blog-9.txt
@@ -0,0 +1 @@
+https://fluca1978.github.io/2025/08/04/PerlWeeklyChallenge333.html#task1pljava
diff --git a/challenge-333/luca-ferrari/pljava/pom.xml b/challenge-333/luca-ferrari/pljava/pom.xml
index 677727f42f..353e1821da 100644
--- a/challenge-333/luca-ferrari/pljava/pom.xml
+++ b/challenge-333/luca-ferrari/pljava/pom.xml
@@ -7,14 +7,14 @@
 
   <groupId>PWC</groupId>
   <artifactId>
-    PWC332
+    PWC333
   </artifactId>
   <version>
     1
   </version>
 
-  <name>Perl Weekly Challenge 332 with package PWC332</name>
-  <description>Implementation of the tasks in PL/Java for PWC 332</description>
+  <name>Perl Weekly Challenge 333 with package PWC333</name>
+  <description>Implementation of the tasks in PL/Java for PWC 333</description>
 
   <properties>
     <project.build.sourceEncoding>US-ASCII</project.build.sourceEncoding>
diff --git a/challenge-333/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-333/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
index 0000000000..350a46cf82
--- /dev/null
+++ b/challenge-333/luca-ferrari/pljava/src/main/java/Task1.java
@@ -0,0 +1,76 @@
+
+
+
+package PWC333;
+
+/**
+ * PL/Java implementation for PWC 333
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+ *
+ *
+ * To compile on the local machine:
+
+ $ export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64/  # if not already set
+ $ mvn clean build
+ $ scp target/PWC333-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC333-1.jar', 'PWC333', true );
+ select sqlj.set_classpath( 'public', 'PWC333' );
+
+ select pwc333.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC333-1.jar', 'PWC333', true );
+
+*/
+
+import org.postgresql.pljava.*;
+import org.postgresql.pljava.annotation.Function;
+import static org.postgresql.pljava.annotation.Function.Effects.IMMUTABLE;
+import static org.postgresql.pljava.annotation.Function.OnNullInput.RETURNS_NULL;
+
+import java.util.*;
+import java.util.stream.*;
+import java.sql.SQLException;
+import java.util.logging.*;
+import java.sql.ResultSet;
+import java.sql.Date;
+
+public class Task1 {
+
+    private final static Logger logger = Logger.getAnonymousLogger();
+
+    @Function( schema = "pwc333",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final boolean task1_pljava( int coordinates[] ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc333.task1_pljava" );
+
+	List<Map<String, Integer>> coords = new LinkedList<Map<String, Integer>>();
+
+	for ( int i = 0; i < coordinates.length - 1; i++ ) {
+	    Map<String, Integer> current = new HashMap<String, Integer>();
+	    current.put( "x", coordinates[ i++ ] );
+	    current.put( "y", coordinates[ i ] );
+	    coords.add( current );
+	}
+
+	Map<String, Integer> first  = coords.get( 0 );
+	Map<String, Integer> second = coords.get( 1 );
+
+	for ( int i = 2; i < coords.size(); i++ ) {
+	    Map<String, Integer> current = coords.get( i );
+
+	    if ( ( current.get( "x" ) - first.get( "x" ) ) * ( first.get( "y" ) - second.get( "y" ) )
+		 != ( current.get( "y" ) - first.get( "y" ) ) * ( first.get( "x" ) - second.get( "x" ) ) )
+		return false;
+	}
+
+	return true;
+    }
+}
diff --git a/challenge-333/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-333/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..06365ac6d0
--- /dev/null
+++ b/challenge-333/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,76 @@
+
+
+
+package PWC333;
+
+/**
+ * PL/Java implementation for PWC 333
+ * Task 2
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+ *
+ *
+ * To compile on the local machine:
+
+ $ export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64/  # if not already set
+ $ mvn clean build
+ $ scp target/PWC333-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC333-1.jar', 'PWC333', true );
+ select sqlj.set_classpath( 'public', 'PWC333' );
+
+ select pwc333.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC333-1.jar', 'PWC333', true );
+
+*/
+
+import org.postgresql.pljava.*;
+import org.postgresql.pljava.annotation.Function;
+import static org.postgresql.pljava.annotation.Function.Effects.IMMUTABLE;
+import static org.postgresql.pljava.annotation.Function.OnNullInput.RETURNS_NULL;
+
+import java.util.*;
+import java.util.stream.*;
+import java.sql.SQLException;
+import java.util.logging.*;
+import java.sql.ResultSet;
+import java.sql.Date;
+
+public class Task2 {
+
+    private final static Logger logger = Logger.getAnonymousLogger();
+
+    @Function( schema = "pwc333",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final int[] task2_pljava( int[] numbers ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc333.task2_pljava" );
+
+	List<Integer> result = new LinkedList<Integer>();
+	int limit = numbers.length;
+
+	for ( int i = 0; i < numbers.length && limit > 0; i++ ) {
+	    result.add( numbers[ i ] );
+	    limit--;
+	    if ( limit == 0 )
+		break;
+
+	    if ( numbers[ i ] == 0 ) {
+		result.add( numbers[ i ] );
+		limit--;
+	    }
+	}
+
+	int[] tmp = new int[ result.size() ];
+	for ( int i = 0; i < tmp.length; i++ )
+	    tmp[ i ] = result.get( i );
+
+	return tmp;
+
+    }
+}
diff --git a/challenge-333/luca-ferrari/plperl/ch-1.plperl b/challenge-333/luca-ferrari/plperl/ch-1.plperl
new file mode 100644
index 0000000000..9323503e63
--- /dev/null
+++ b/challenge-333/luca-ferrari/plperl/ch-1.plperl
@@ -0,0 +1,36 @@
+--
+-- Perl Weekly Challenge 333
+-- Task 1
+-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+--
+
+CREATE SCHEMA IF NOT EXISTS pwc333;
+
+CREATE OR REPLACE FUNCTION
+pwc333.task1_plperl( int[] )
+RETURNS boolean
+AS $CODE$
+
+   my ( $coordinates ) = @_;
+   die "Wrong arguments!" if ( $coordinates->@* % 2 != 0 );
+
+   my @coords;
+   while ( $coordinates->@* ) {
+   	 push @coords, { x => shift( $coordinates->@* ),
+	                 y => shift( $coordinates->@* ) };
+   }
+
+   my $first  = $coords[ 0 ];
+   my $second = $coords[ 1 ];
+
+   for my $i ( 2 .. $#coords ) {
+       my $current = $coords[ $i ];
+       return 0 if ( ( $current->{ x } - $first->{ x } ) * ( $first->{ y } - $second->{ y } )
+                     != ( $current->{ y } - $first->{ y } ) * ( $first->{ x } - $second->{ x } ) );
+       
+   }
+
+   return 1;
+   
+$CODE$
+LANGUAGE plperl;
diff --git a/challenge-333/luca-ferrari/plperl/ch-2.plperl b/challenge-333/luca-ferrari/plperl/ch-2.plperl
new file mode 100644
index 0000000000..41156b16d4
--- /dev/null
+++ b/challenge-333/luca-ferrari/plperl/ch-2.plperl
@@ -0,0 +1,32 @@
+--
+-- Perl Weekly Challenge 333
+-- Task 2
+-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+--
+
+CREATE SCHEMA IF NOT EXISTS pwc333;
+
+CREATE OR REPLACE FUNCTION
+pwc333.task2_plperl( int[] )
+RETURNS SETOF int
+AS $CODE$
+
+   my ( $numbers ) = @_;
+
+   my $limit = scalar( $numbers->@* );
+   my $index = 0;
+
+   while ( $limit ) {
+   	 my $current = $numbers->@[ $index++ ];
+	 return_next( $current );
+         $limit--;
+	 last if ( ! $limit );
+	 return_next( $current ) if ( ! $current );
+	 $limit-- if ( ! $current );
+
+   }
+
+   return undef;
+   
+$CODE$
+LANGUAGE plperl;
diff --git a/challenge-333/luca-ferrari/plpgsql/ch-1.sql b/challenge-333/luca-ferrari/plpgsql/ch-1.sql
new file mode 100644
index 0000000000..26ca767eba
--- /dev/null
+++ b/challenge-333/luca-ferrari/plpgsql/ch-1.sql
@@ -0,0 +1,15 @@
+--
+-- Perl Weekly Challenge 333
+-- Task 1
+-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+--
+
+CREATE SCHEMA IF NOT EXISTS pwc333;
+
+CREATE OR REPLACE FUNCTION
+pwc333.task1_plpgsql( c int[] )
+RETURNS boolean
+AS $CODE$
+   SELECT pwc333.task1_plperl( c );
+$CODE$
+LANGUAGE sql;
diff --git a/challenge-333/luca-ferrari/plpgsql/ch-2.sql b/challenge-333/luca-ferrari/plpgsql/ch-2.sql
new file mode 100644
index 0000000000..363466f824
--- /dev/null
+++ b/challenge-333/luca-ferrari/plpgsql/ch-2.sql
@@ -0,0 +1,42 @@
+--
+-- Perl Weekly Challenge 333
+-- Task 2
+-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+--
+
+CREATE SCHEMA IF NOT EXISTS pwc333;
+
+CREATE OR REPLACE FUNCTION
+pwc333.task2_plpgsql( n int[] )
+RETURNS SETOF int
+AS $CODE$
+DECLARE
+	v int;
+	l int;
+BEGIN
+
+	l := array_length( n, 1 );
+
+	FOREACH v IN ARRAY n LOOP
+		IF l = 0 THEN
+		   RETURN;
+		END IF;
+
+
+		RETURN NEXT v;
+		l := l - 1;
+
+		IF l = 0 THEN
+		   RETURN;
+		END IF;
+
+		IF v = 0 THEN
+		   RETURN NEXT v;
+		   l := l - 1;
+		END IF;
+	END LOOP;
+
+	RETURN;
+END
+$CODE$
+LANGUAGE plpgsql;
diff --git a/challenge-333/luca-ferrari/python/ch-1.py b/challenge-333/luca-ferrari/python/ch-1.py
new file mode 100644
index 0000000000..7f647fdbec
--- /dev/null
+++ b/challenge-333/luca-ferrari/python/ch-1.py
@@ -0,0 +1,44 @@
+#!python
+
+#
+# Perl Weekly Challenge 333
+# Task 1
+#
+# See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+#
+
+import sys
+
+# task implementation
+# the return value will be printed
+def task_1( args ):
+    coords = []
+    for i in range( 0, len( args ) - 1 ):
+        if i % 2 != 0:
+            continue
+
+        x = int( args[ i ] )
+        y = int( args[ i + 1 ] )
+
+        current = {}
+        current[ 'x' ] = x
+        current[ 'y' ] = y
+
+        coords.append( current )
+
+    first  = coords[ 0 ]
+    second = coords[ 1 ]
+
+
+    for i in range( 2, len( coords ) ):
+        current = coords[ i ]
+        if ( ( current[ 'x' ] - first[ 'x' ] ) * ( first[ 'y' ] - second[ 'y' ] ) ) != ( ( current[ 'y' ] - second[ 'y' ] ) * ( first[ 'x' ] - second[ 'x' ] ) ):
+            return False
+
+    return True
+
+
+
+# invoke the main without the command itself
+if __name__ == '__main__':
+    print( task_1( sys.argv[ 1: ] ) )
diff --git a/challenge-333/luca-ferrari/python/ch-2.py b/challenge-333/luca-ferrari/python/ch-2.py
new file mode 100644
index 0000000000..0d36552024
--- /dev/null
+++ b/challenge-333/luca-ferrari/python/ch-2.py
@@ -0,0 +1,37 @@
+#!python
+
+#
+# Perl Weekly Challenge 333
+# Task 2
+#
+# See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+#
+
+import sys
+
+# task implementation
+# the return value will be printed
+def task_2( args ):
+    result = []
+    limit  = len( args )
+    index  = 0
+
+    while limit > 0:
+        current = int( args[ index ] )
+        index   = index + 1
+        result.append( current )
+        limit = limit - 1
+        if limit == 0:
+            break
+
+        if current == 0:
+            result.append( current )
+            limit = limit - 1
+            if limit == 0:
+                break
+
+    return result
+
+# invoke the main without the command itself
+if __name__ == '__main__':
+    print( task_2( sys.argv[ 1: ] ) )
diff --git a/challenge-333/luca-ferrari/raku/ch-1.raku b/challenge-333/luca-ferrari/raku/ch-1.raku
new file mode 100644
index 0000000000..f750a010ed
--- /dev/null
+++ b/challenge-333/luca-ferrari/raku/ch-1.raku
@@ -0,0 +1,28 @@
+#!raku
+
+#
+# Perl Weekly Challenge 333
+# Task 1
+#
+# See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+#
+
+sub MAIN( *@coordinates
+	  where { @coordinates.grep( * ~~ Int ).elems == @coordinates.elems && @coordinates.elems %% 2  } ) {
+
+    my @coords;
+    for @coordinates -> $x, $y {
+	@coords.push: { x => $x, y => $y };
+    }
+
+    my $first  = @coords[ 0 ];
+    my $second = @coords[ 1 ];
+
+    for 2 ..^ @coords.elems {
+	my $current = @coords[ $_ ];
+	'False'.say and exit if ( ( $current<x> - $first<x> ) * ( $first<y> - $second<y> )
+				  != ( $current<y> - $first<y> ) * ( $first<x> - $second<x> ) );
+    }
+
+    'True'.say;
+}
diff --git a/challenge-333/luca-ferrari/raku/ch-2.raku b/challenge-333/luca-ferrari/raku/ch-2.raku
new file mode 100644
index 0000000000..e57937aa1b
--- /dev/null
+++ b/challenge-333/luca-ferrari/raku/ch-2.raku
@@ -0,0 +1,19 @@
+#!raku
+
+#
+# Perl Weekly Challenge 333
+# Task 2
+#
+# See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+#
+
+sub MAIN( *@nums where { @nums.elems == @nums.grep( * ~~ Int ).elems } ) {
+    my @result;
+
+    for @nums {
+	@result.push: $_;
+	@result.push: $_ if ( $_ == 0 );
+    }
+
+    @result[ 0 .. @nums.elems - 1 ].join( ', ' ).say;
+}