Gave multiple ways of solving the problem. Interviewer first agrees to one way of solving then wanted another way of solving, then totally dismisses the original method of solving. Interviewer then gives a piece of personal advice about listening first before jumping into a solution, then says that he thought of many different test cases, when originally he discussed about only a simple output. Then he adds more use cases then says the candidate has complicated the solution, where as originally the discussion was only solving the problem. Then says he has to leave and hangs up on the candidate even as they wait on the phone and is still talking.