LeetCode Remove Duplicates from Sorted List

1.题目

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​​.

2.解决方案

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

思路:比较简单的list删除操作。

​​http://www.waitingfy.com/archives/1600​​