Logger Rate Limiter

Design a logger that receives a stream of messages with timestamps (in seconds) and prints each distinct message at most once every 10 seconds.

Implement the Logger class:

• Logger() creates the logger.
• shouldPrintMessage(timestamp, message) returns true if message should be printed at timestamp, otherwise false. A message printed at time t blocks the same message until time t + 10: a call at t + 9 returns false, a call at t + 10 returns true.

Timestamps never decrease between calls (several calls may share a timestamp). Only a call that returns true starts a new 10-second block; a rejected call does not extend it.