[Leetcode]Remove Duplicates from Sorted List

Given a sorted linked list, delete all duplicates such that each element appear only once.

简单题，注意逻辑顺序就好了。

class Solution {
public:
    ListNode *deleteDuplicates(ListNode *head) {
        ListNode *node = head;
        while(node!=NULL){
            if(node->next!=NULL && node->val==node->next->val)
                node->next=node->next->next;
            else
                node = node->next;
        }
        return head;
    }
};