You are given two linked lists representing two non-negative numbers. The most significant digit comes first 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 con…

445-Add Two Numbers II You are given two linked lists representing two non-negative numbers. The most significant digit comes first and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. You may assume the…

You are given two non-empty linked lists representing two non-negative integers. The most significant digit comes first 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…

题目标签:Linked List 题目给了我们两个 数字的linked list,让我们把它们相加,返回一个新的linked list. 因为题目要求不能 reverse,可以把 两个list 的数字都 存入 两个stack.利用了stack的特性,就可以从后面把数字相加,具体看code. Java Solution: Runtime:  6 ms, faster than 51.06% Memory Usage: 45.4 MB, less than 64.71% 完成日期:07/08/201…

题意:两个非空链表求和,这两个链表所表示的数字没有前导零,要求不能修改原链表,如反转链表. 分析:用stack分别存两个链表的数字,然后从低位开始边求和边重新构造链表. Input: (7 -> 2 -> 4 -> 3) + (5 -> 6 -> 4) Output: 7 -> 8 -> 0 -> 7 /** * Definition for singly-linked list. * struct ListNode { * int val; * ListN…

445. 两数相加 II 445. Add Two Numbers II 题目描述 给定两个非空链表来代表两个非负整数.数字最高位位于链表开始位置.它们的每个节点只存储单个数字.将这两数相加会返回一个新的链表. 你可以假设除了数字 0 之外,这两个数字都不会以零开头. 进阶: 如果输入链表不能修改该如何处理?换句话说,你不能对列表中的节点进行翻转. LeetCode445. Add Two Numbers II中等 示例: 输入: (7 -> 2 -> 4 -> 3) + (5 ->…

Question 445. Add Two Numbers II Solution 题目大意:两个列表相加 思路:构造两个栈,两个列表的数依次入栈,再出栈的时候计算其和作为返回链表的一个节点 Java实现: public ListNode addTwoNumbers(ListNode l1, ListNode l2) { Stack<Integer> s1 = new Stack<>(); Stack<Integer> s2 = new Stack<>();…

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…

LeetCode(2) || Add Two Numbers && Longest Substring Without Repeating Characters 题记 刷LeetCode第二天,今天做了两道题,速度比我想的要慢,看样子两个月的目标有点难,尽力吧.今天主要做了Add Two Numbers和Longest Substring Without Repeating Characters 两道题,下面就来看下这两道题吧. 题一:Add Two Numbers 题目内容 You ar…

题目: LeetCode:1. Add Two Numbers 描述: Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice.…