1.描述
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.分析
3.代码
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* struct ListNode *next;
* };
*/
struct ListNode* deleteDuplicates(struct ListNode* head) {
if (NULL == head || NULL == head->next) return head;
struct ListNode* cur = head;
while (NULL != cur->next) {
if (cur->val == cur->next->val) {
struct ListNode* tmp = cur->next;
cur->next = tmp->next;
free(tmp);
} else {
cur = cur->next;
}
}
return head;
}
