Leet Code OJ 83. Remove Duplicates from Sorted List [Difficulty: Easy]
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题目:
Given a sorted linked list, delete all duplicates such that each element appear only once.
For example,
Given 1->1->2, return 1->2.
Given 1->1->2->3->3, return 1->2->3.
翻译:
给定一个排序号的链表,删除所有的重复元素,保证每个元素只出现一次。
分析:
在当前节点删除下一节点,会比较容易操作,只需要修改next指针。
代码:
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) { val = x; }
* }
*/
public class Solution {
public ListNode deleteDuplicates(ListNode head) {
if(head==null){
return null;
}
ListNode currentNode=head;
while(currentNode.next!=null){
if(currentNode.next.val==currentNode.val){
currentNode.next=currentNode.next.next;
}else{
currentNode=currentNode.next;
}
}
return head;
}
}
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