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 contain a single digit. Add the two numbers and return it as a linked list.
You may assume the two numbers do not contain any leading zero, except the number 0 itself.
Input: (2 -> 4 -> 3) + (5 -> 6 -> 4 )
Output: 7 -> 0 -> 8
Explanation: 342 + 465 = 807
# Definition for singly-linked list.
# class ListNode:
# def __init__(self, x):
# self.val = x
# self.next = None
class Solution:
def addTwoNumbers(self, l1, l2):
"""
:type l1: ListNode
:type l2: ListNode
:rtype: ListNode
"""
newList = ListNode(self)
temp = newList
carry =0
sumTotal = 0
while l1 or l2 or carry:
if l1:
sumTotal = sumTotal+ l1.val
l1 = l1.next
if l2:
sumTotal = sumTotal + l2.val
l2 = l2.next
sumTotal = sumTotal + carry
carry = sumTotal//10
temp.next = ListNode(sumTotal%10)
sumTotal = 0
temp = temp.next
return newList.next