Creating a template for paxtonfitzpatrick's solution to problem 1518

Author: paxtonfitzpatrick

problems/1518/paxtonfitzpatrick.md

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+# [Problem 1518: Water Bottles](https://leetcode.com/problems/water-bottles)
+
+## Initial thoughts (stream-of-consciousness)
+
+## Refining the problem, round 2 thoughts
+
+## Attempted solution(s)
+```python
+class Solution:  # paste your code here!
+    ...
+```