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

We build a table of n rows (1-indexed). We start by writing 0 in the 1st row. Now in every subsequent row, we look at the previous row and replace each occurrence of 0 with 01, and each occurrence of 1 with 10.

For example, for n = 3, the 1st row is 0, the 2nd row is 01, and the 3rd row is 0110.

Given two integer n and k, return the kth (1-indexed) symbol in the nth row of a table of n rows.
 
Please complete the following python code precisely:
```python
class Solution:
    def kthGrammar(self, n: int, k: int) -> int:
```