这道题还是很简单的，我竟然十分钟不到就AC了，而且效率最佳12ms，有点不敢相信。
83. Remove Duplicates from Sorted List
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.
效率最佳！.png
我自己的代码：
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode(int x) : val(x), next(NULL) {}
* };
*/
class Solution {
public:
ListNode* deleteDuplicates(ListNode* head) {
ListNode* now = head;
if(head == NULL) return head;
while(now -> next != NULL)
if(now -> next -> val == now -> val)
now -> next = now -> next -> next;
else
now = now -> next;
return head;
}
};
