【leetcode每日一题】NO83.Remove Duplicates from Sorted List

/**
 * 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) {
        if(head==NULL)
            return head;
        ListNode *nextNode=head->next;
        ListNode *curNode=head;
        while(nextNode!=NULL)
        {
            if(curNode->val==nextNode->val)
            {
                curNode->next=nextNode->next;
                nextNode=curNode->next;
            }
            else
            {
                curNode=nextNode;
                nextNode=nextNode->next;
            }
        }
        return head;
    }
};