Please solve the programming task below using a self-contained code snippet in a markdown code block.

Write an algorithm to determine if a number n is happy.
A happy number is a number defined by the following process:

Starting with any positive integer, replace the number by the sum of the squares of its digits.
Repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1.
Those numbers for which this process ends in 1 are happy.

Return true if n is a happy number, and false if not.
 
Please complete the following python code precisely:
```python
class Solution:
    def isHappy(self, n: int) -> bool:
```