Created
July 19, 2018 20:49
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# Definition for singly-linked list. | |
# class ListNode(object): | |
# def __init__(self, x): | |
# self.val = x | |
# self.next = None | |
class Solution(object): | |
def addTwoNumbers(self, l1, l2): | |
""" | |
:type l1: ListNode | |
:type l2: ListNode | |
:rtype: ListNode | |
""" | |
carry = 0 | |
c1 = l1 | |
c2 = l2 | |
head = ListNode(None) | |
last = None | |
current = head | |
while c1 is not None or c2 is not None or carry: | |
current_sum = carry | |
if c1 is not None: | |
current_sum += c1.val | |
c1 = c1.next | |
if c2 is not None: | |
current_sum += c2.val | |
c2 = c2.next | |
carry = 0 | |
if current_sum >= 10: carry = 1 | |
current_sum %= 10 | |
current.val = current_sum | |
current.next = ListNode(None) | |
last = current | |
current = current.next | |
last.next = None | |
return head |
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