https://leetcode.com/problems/add-two-numbers/description/
Add Two Numbers - LeetCode
Add Two Numbers - 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 as
leetcode.com
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# 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]:
root = head = ListNode(0)
carry = 0
while l1 or l2 or carry:
sum = 0
if l1:
sum+=l1.val
l1 = l1.next
if l2:
sum+=l2.val
l2=l2.next
carry, val = divmod(sum+carry,10)
head.next = ListNode(val)
head = head.next
return root.next
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cs |
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