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.
Example
Input: (2 -> 4 -> 3) + (5 -> 6 -> 4) Output: 7 -> 0 -> 8 Explanation: 342 + 465 = 807.
数据结构之前只学过C语言版,没有用面向对象的语言写过,这次是在leetcode讨论区找到的解决代码,自己敲了一遍后加了注释,有错误欢迎讨论
# Definition for singly-linked list.
# class ListNode(object):
# def __init__(self, x):
# self.val = x
# self.next = None
# 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
"""
Head = ListNode(0)//声明一个头结点,结点值为0
add = 0//进位
output = Head
while l1 or l2 or add:
val = (l1.val if l1 else 0) + (l2.val if l2 else 0) + add//数值,判定条件为节点不为空,之前我改判定条件为.val不为空,但是如果给出的input为单个数值即没有后续节点的单独节点会报错。
add = val/10
output.next = ListNode(val%10)//下一个结点的值
output = output.next//下一次循环从下一个节点开始
l1 = l1.next if l1 else None
l2 = l2.next if l2 else None//判定条件为节点不为空,之前我改判定条件为.next不为空,但是如果给出的input为单个数值即没有后续节点的单独节点会报错。
return Head.next
def addTwoNumbers(self, l1, l2):
"""
:type l1: ListNode
:type l2: ListNode
:rtype: ListNode
"""
Head = ListNode(0)//声明一个头结点,结点值为0
add = 0//进位
output = Head
while l1 or l2 or add:
val = (l1.val if l1 else 0) + (l2.val if l2 else 0) + add//数值,判定条件为节点不为空,之前我改判定条件为.val不为空,但是如果给出的input为单个数值即没有后续节点的单独节点会报错。
add = val/10
output.next = ListNode(val%10)//下一个结点的值
output = output.next//下一次循环从下一个节点开始
l1 = l1.next if l1 else None
l2 = l2.next if l2 else None//判定条件为节点不为空,之前我改判定条件为.next不为空,但是如果给出的input为单个数值即没有后续节点的单独节点会报错。
return Head.next