LeetCode82 Remove Duplicates from Sorted List II
2016-10-08 21:14
483 查看
题目:
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list.(Medium)
For example,
Given
Given
分析:
链表去重的follow-up,但是题号这个在前面,要把有重复元素,则所有该元素均删掉。
注意:
1. 使用dummy node处理头结点被删除掉的情况。
2. 只要有head-> next -> val存在时,先判断head -> next是否为空。
代码:
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list.(Medium)
For example,
Given
1->2->3->3->4->4->5, return
1->2->5.
Given
1->1->1->2->3, return
2->3.
分析:
链表去重的follow-up,但是题号这个在前面,要把有重复元素,则所有该元素均删掉。
注意:
1. 使用dummy node处理头结点被删除掉的情况。
2. 只要有head-> next -> val存在时,先判断head -> next是否为空。
代码:
1 /** 2 * Definition for singly-linked list. 3 * struct ListNode { 4 * int val; 5 * ListNode *next; 6 * ListNode(int x) : val(x), next(NULL) {} 7 * }; 8 */ 9 class Solution { 10 public: 11 ListNode* deleteDuplicates(ListNode* head) { 12 ListNode dummy(0); 13 dummy.next = head; 14 head = &dummy; 15 while(head -> next != nullptr && head -> next -> next != nullptr) { 16 if (head -> next -> val == head -> next -> next -> val) { 17 int val = head -> next -> val; 18 while (head -> next != nullptr && head -> next -> val == val) { //只要取head->next,先判断 19 ListNode* temp = head -> next; 20 head -> next = head -> next -> next; 21 delete temp; 22 } 23 } 24 else { 25 head = head -> next; 26 } 27 } 28 return dummy.next; 29 } 30 };
相关文章推荐
- leetcode[82] Remove Duplicates from Sorted List II
- LeetCode(82) Remove Duplicates from Sorted List II
- leetcode 82: Remove Duplicates from Sorted List II
- LeetCode---(82) Remove Duplicates from Sorted List II
- 【LeetCode】82 - Remove Duplicates from Sorted List II
- 【leetcode】【单链表】【82】Remove Duplicates from Sorted List II
- [Leetcode]#82 Remove Duplicates from Sorted List II
- LeetCode82:Remove Duplicates from Sorted List II
- LeetCode 82: Remove Duplicates from Sorted List II
- Leetcode[82]-Remove Duplicates from Sorted List II
- leetcode || 82、Remove Duplicates from Sorted List II
- leetcode[82]Remove Duplicates from Sorted List II
- [leetcode-82]Remove Duplicates from Sorted List II(C)
- [leetcode]82 Remove Duplicates from Sorted List II
- LeetCode 82之Remove Duplicates from Sorted List II的Java题解
- 【leetcode】【单链表】【82】Remove Duplicates from Sorted List II
- [LeetCode]82 Remove Duplicates from Sorted List II
- 【leetcode c++】82 Remove Duplicates from Sorted List II
- leetcode 82: Remove Duplicates from Sorted List II
- leetcode--83&82 Remove Duplicates from sorted list I&II