LeetCode 082 Remove Duplicates from Sorted List II
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将单链表中有重复的数字删除,删除重复的数字本身。
Given 1->2->3->3->4->4->5
, return 1->2->5
.
Given 1->1->1->2->3
, return 2->3
.
* 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* temp=new ListNode(head->val-1); temp->next=head; ListNode* cnt=temp; while(temp&&temp->next&&temp->next->next){ if(temp->next->val==temp->next->next->val){ ListNode* uu=temp->next->next->next; while(uu!=NULL&&uu->val==temp->next->val)uu=uu->next; temp->next=uu; } else temp=temp->next; } return cnt->next; }};
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