2 files changed, 42 insertions, 0 deletions
diff --git a/challenge-277/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-277/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
index 0000000000..157decedd7
--- /dev/null
+++ b/challenge-277/luca-ferrari/pljava/src/main/java/Task1.java
@@ -0,0 +1,27 @@
+public static int task1_pljava( String[] words1, String[] words2 ) throws SQLException {
+    logger.log( Level.INFO, "Entering pwc277.task1_pljava" );
+
+    final Map<String, Integer[]> counting = new HashMap<String, Integer[]>();
+
+    Stream.of( words1 ).forEach( current -> {
+    	Integer[] count = { 0, 0 };
+    	counting.putIfAbsent( current, count );
+    	count = counting.get( current );
+    	count[ 0 ]++;
+    	counting.put( current, count );
+    } );
+
+
+    Stream.of( words2 ).forEach( current -> {
+    	Integer[] count = { 0, 0 };
+    	counting.putIfAbsent( current, count );
+    	count = counting.get( current );
+    	count[ 1 ]++;
+    	counting.put( current, count );
+    } );
+
+    return (int) counting.entrySet().stream().filter( current -> {
+    	Integer[] count = current.getValue();
+    	return count[ 0 ] == count[ 1 ] && count[ 0 ] == 1;
+    } ).count();
+}
diff --git a/challenge-277/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-277/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..87c0dde2d0
--- /dev/null
+++ b/challenge-277/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,15 @@
+public static final int task2_pljava( int[] numbers ) throws SQLException {
+    logger.log( Level.INFO, "Entering pwc277.task2_pljava" );
+
+    final int[] c = new int[]{ 0 };
+    IntStream.range( 0, numbers.length - 1 )
+        .forEach( i -> {
+    	    c[ 0 ] += IntStream.range( i + 1, numbers.length )
+    		.filter( j -> {
+    			return numbers[ i ] != numbers[ j ]
+    			    && Math.abs( numbers[ i ] - numbers[ j ] ) < Math.min( numbers[ i ], numbers[ j ] );
+    		    } ).count();
+    	} );
+
+    return c[ 0 ];
+}