leetcode add two numbers python
# 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
"""
cur = None
carry = 0
sum = 0
while l1 or l2 or carry: sums = carry
if l1:
sums += l1.val
l1 = l1.next
if l2:
sums += l2.val
l2 = l2.next if sums >= 10:
carry = 1
sums %=10
else:
carry = 0
item = ListNode(sums)
if cur == None:
cur = item
else:
p = cur
while p.next != None:
p = p.next
p.next = item return cur
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