public boolean PackageProblem(int[] arr,int start,int targetLeft,int target)

     {

         if(arr.length==0)

         {

             System.out.println("no Answer");

             return false;

         }

         if(start==arr.length)

         {

             int[] tempArr=new int[arr.length-1];

             System.arraycopy(arr, 1, tempArr, 0, arr.length-1);

             return PackageProblem(tempArr, 0, target, target);

         }

         else if(arr[start]>targetLeft)

         {

             return PackageProblem(arr, start+1, targetLeft, target);

         }

         else if(arr[start]==targetLeft)

         {

             System.out.println("yes has answer");

             return true;

         }

         else{

             return PackageProblem(arr, start+1, targetLeft-arr[start], target);

         }

     }