Data commit

Task/Power-set/Java/power-set-1.java

@@ -0,0 +1,25 @@
+public static ArrayList<String> getpowerset(int a[],int n,ArrayList<String> ps)
+    {
+        if(n<0)
+        {
+            return null;
+        }
+        if(n==0)
+        {
+            if(ps==null)
+                ps=new ArrayList<String>();
+            ps.add(" ");
+            return ps;
+        }
+        ps=getpowerset(a, n-1, ps);
+        ArrayList<String> tmp=new ArrayList<String>();
+        for(String s:ps)
+        {
+            if(s.equals(" "))
+                tmp.add(""+a[n-1]);
+            else
+                tmp.add(s+a[n-1]);
+        }
+        ps.addAll(tmp);
+        return ps;
+    }