Remove-duplicates-from-sorted-list
題目描述
Given a sorted linked list, delete all duplicates such that each element appear only once.
For example,
Given1->1->2, return1->2.
Given1->1->2->3->3, return1->2->3.
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) {
* val = x;
* next = null;
* }
* }
*/
public class Solution {
public ListNode deleteDuplicates(ListNode head) {
//ListNode tail = head;
while(head != null){
while(head.next != null && head.val == head.next.val){
head.next = head.next.next;
}
head = head.next;
}
return head;
}
}