E. HQ
*special; constructive algorithms
The famous joke programming language HQ9+ has only 4 commands. In this problem we will explore its subset — a language called HQ...
The only line of the input is a string between 1 and 106 characters long.
Output ""Yes"" or ""No"".
The rest of the problem statement was destroyed by a stray raccoon. We are terribly sorry for the inconvenience.