Leetcode Remove Duplicates from Sorted List 83

83. Remove Duplicates from Sorted List

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Total Accepted: 111563 Total Submissions: 304716 Difficulty: Easy

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.

/** * 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 || head.next == null)            return head;   // 特殊情况判断        ListNode p = head;        while(p!=null && p.next!=null){            if(p.val == p.next.val){   //有重复的值 删除                p.next = p.next.next;            }            else{             //否则 直接链接到下一个                p = p.next;               }        }        return head;    }}