Leetcode Add Two Numbers for Noobs | Python

Описание: DIFFICULTY: MEDIUM

REFERENCES
  / linked-lists-in-python  
https://www.geeksforgeeks.org/python-...
https://www.geeksforgeeks.org/linked-...
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You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order, and each of their nodes contains a single digit. Add the two numbers and return the sum as a linked list.

You may assume the two numbers do not contain any leading zero, except the number 0 itself.