code: protected static void main(String args[]) {
  	int from = Integer.parseInt(args[0]);	
  	int to = Integer.parseInt(args[1]);
  	
  	statistics(from,to);
  }
docs: Tests correctness. Try
  from=1000, to=10000
  from=200,  to=1000
  from=16,   to=1000
  from=1000, to=Integer.MAX_VALUE