leetcode之Add Two Numbers

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Add Two Numbers

AC Rate: 1710/7566

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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

此题很简单，不多说。

下面是我的代码：

public ListNode addTwoNumbers(ListNode l1, ListNode l2) {ListNode node=null;node=buildList(l1, l2, node);return node;}public ListNode buildList(ListNode l1, ListNode l2,ListNode node){int addDigit=0,v1,v2;ListNode tmp=node;while(!(l1==null&&l2==null)){if(l1!=null)v1=l1.val;elsev1=0;if(l2!=null)v2=l2.val;else v2=0;int value=v1+v2+addDigit;int digit=value%10;int add=value/10;ListNode newNode=new ListNode(digit);addDigit=add;if(tmp==null){tmp=newNode;node=tmp;}else{tmp.next=newNode;tmp=tmp.next;}if(l1!=null)l1=l1.next;if(l2!=null)l2=l2.next;}ListNode tmp2=node;if(addDigit!=0){while(tmp2.next!=null)tmp2=tmp2.next;tmp2.next=new ListNode(addDigit);}return node;}