class LowArray
 {
 private long[] a; // ref to array a
 public LowArray(int size) // constructor
 { a = new long[size]; } // create array
 public void setElem(int index, long value) // set value
 { a[index] = value; }
 public long getElem(int index) // get value
 { return a[index]; }
 } // end class LowArray