83. Remove Duplicates from Sorted List

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.

Subscribe to see which companies asked this question

/** * 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 tmp = head;        int s = head.val;        for(ListNode a = head;a!=null;a=a.next){            if(s==a.val)continue;            s=a.val;            tmp.next=a;            tmp=a;        }        tmp.next=null;        return head;    }}