Danial · 2013-12-10 19:14:15

what wrong with your question,my code worked well but I get Presentation Error every time,can you explain about Presentation Error

ＢＥＣＣＡ · 2013-12-12 19:59:22

The problem says:

This problem contains multiple test cases

and

There is a blank line between output blocks.

Well it means it has multiple test cases so you have to add a blank line after evey test case except the last test case.