Logger Rate Limiter

Question

## Problem

Design a logger that receives a stream of messages with timestamps and prints each unique message **at most once every 10 seconds**.

## Example
```
shouldPrint(1,"foo") -> true
shouldPrint(2,"foo") -> false
shouldPrint(11,"foo") -> true
```

## Constraints
- Timestamps arrive in non-decreasing order

## Approach
Hash map of message -> next-allowed timestamp. Netflix favors clean design and trade-off talk over speed.