LC 0002 [M] Add Two Numbers - ALawliet/algorithms GitHub Wiki
# Definition for singly-linked list.
# class ListNode:
# def __init__(self, val=0, next=None):
# self.val = val
# self.next = next
class Solution:
def addTwoNumbers(self, l1: Optional[ListNode], l2: Optional[ListNode]) -> Optional[ListNode]:
dummy = ListNode()
cur = dummy
carry = 0
while l1 or l2 or carry:
v1 = l1.val if l1 else 0
v2 = l2.val if l2 else 0
# val = v1 + v2 + carry
# carry = val // 10
# val = val % 10
carry, val = divmod(v1 + v2 + carry, 10)
cur.next = ListNode(val)
cur = cur.next
l1 = l1.next if l1 else None
l2 = l2.next if l2 else None
return dummy.next