【leetcode】2. Add Two Numbers 【medium】
来源:互联网 发布:mac如何导入手机照片 编辑:程序博客网 时间:2024/05/29 03:37
题目:
You are given two linked lists representing two non-negative numbers. 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.
Input: (2 -> 4 -> 3) + (5 -> 6 -> 4)
Output: 7 -> 0 -> 8
Subscribe to see which companies asked this question
解题思路:
先判断两个链表哪个较长,然后类似大整数加法,用变量carry标记进位数。只需再注意下较小的链表是否走到头了。如果一样长,而且有进位,还会有最后一种特殊情况发生,要增加链表长度。
代码:
class Solution {
public:
ListNode* addTwoNumbers(ListNode* l1, ListNode* l2) {
ListNode*h=l1;
ListNode*p=l1;
int c1=0,c2=0;
while(h!=NULL)
{
c1++;
h=h->next;
}
h=l2;
p=l2;
while(h!=NULL)
{
c2++;
h=h->next;
}
if(c2>c1)
{
ListNode*temp=l1;
l1=l2;
l2=temp;
}
int carry=0;
int sum=0;ListNode*t=l1;
while(l1!=NULL)
{ if(l2!=NULL)
{
sum=l1->val+l2->val+carry;
if(sum>=10)
{
sum=sum-10;
l1->val=sum;
carry=1;
}
else
{
l1->val=sum;
carry=0;
}
l2=l2->next;
}
else
{
sum=l1->val+carry;
if(sum>=10)
{
l1->val=0;
carry=1;
}
else
{
l1->val=sum;
carry=0;
}
}
if(carry==1&&l1->next==NULL)
{
l1->next=new ListNode(0);
}
l1=l1->next;
}
return t;
}
};
- Leetcode 2. Add Two Numbers (Medium) (cpp)
- 【leetcode】2. Add Two Numbers 【medium】
- LeetCode 2. Add Two Numbers[Medium]
- 【leetcode medium】2. Add Two Numbers
- 2. Add Two Numbers Medium
- 题解——Leetcode 2. Add Two Numbers 难度:Medium
- Leetcode解题笔记 2.Add Two Numbers [Medium]
- <LeetCode><Medium>2 Add Two Numbers
- Leetcode #2 Add Two Numbers(medium)
- Add Two Numbers (Leetcode medium algorithm problem)
- Leetcode OJ 2 Add Two Numbers [Medium]
- week2-leetcode #2-Add two Numbers[Medium]
- Add Two Numbers [Medium]
- Add Two Numbers(medium)
- [Medium]Add Two Numbers
- 2. Add Two Numbers 难度:Medium
- 2. Add Two Numbers(Medium)
- [LeetCode] 002. Add Two Numbers (Medium) (C++/Java/Python)
- 进程通信,管道通信 1.0
- 再来Flag
- java知识点杂货铺【六】
- hibernate manytoone list 查询 发出的语句为什么是 1+N条
- 安装并破解secureCRT7.0和secureFX7.0
- 【leetcode】2. Add Two Numbers 【medium】
- 输入一个字符串,找出最长的数字子串,并指出从第几个字符开始
- Leetcode #327 Count of Range Sum
- Android使用EaseUI集成环信3.0 设置头像和用户名 三
- 米奇诺娃,让我读到了历史的真相。
- LeetCode 13. Roman to Integer
- java中基本数据类型的转换
- Mysql之相关表的操作
- 图像处理之图像内插值与外插值