LeetCode OJ 83. Remove Duplicates from Sorted List

Posted 2020-08-17

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.

 

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解答

这题太水了，注意不要对NULL解引用就好了。

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     struct ListNode *next;
 * };
 */
struct ListNode* deleteDuplicates(struct ListNode* head) {
    struct ListNode *pNode = head;
    
    while(NULL != pNode&&NULL != pNode->next){
        if(pNode->val == pNode->next->val){
            pNode->next = pNode->next->next;
        }
        else{
            pNode = pNode->next;
        }
    }
    return head;
}