1 files changed, 40 insertions, 0 deletions
diff --git a/challenge-252/luca-ferrari/java/ch_2.java b/challenge-252/luca-ferrari/java/ch_2.java
new file mode 100644
index 0000000000..5a4b46083a
--- /dev/null
+++ b/challenge-252/luca-ferrari/java/ch_2.java
@@ -0,0 +1,40 @@
+import java.util.*;
+
+public class ch_2 {
+    public static void main( String argv[] ) throws Exception {
+	int size = Integer.parseInt( argv[ 0 ] );
+
+	if ( size <= 3 )
+	    throw new Exception( "Cannot work with a size less than 3!" );
+
+	List<Integer> nums = new LinkedList<Integer>();
+
+
+	if ( size % 2 == 0 ) {
+	    for ( int i = 1; i < size / 2 ; i++ ) {
+		nums.add( i );
+		nums.add( i * -1 );
+	    }
+	}
+	else {
+	    for ( int i = 1; i < ( size - 1 ) / 2 ; i++ ) {
+		nums.add( i );
+		nums.add( i * -1 );
+	    }
+
+	    int next = ( size - 1 ) / 2 + 1;
+	    nums.add( next );
+	    nums.add( next + 1 );
+	    nums.add( ( next * 2 + 1 ) * -1 );
+	}
+
+
+	boolean printedOne = false;
+	for ( int i : nums ) {
+	    System.out.print( i + ( printedOne ? ", " : "" ) );
+	    printedOne = true;
+	}
+
+	System.out.println();
+    }
+}