hackerrank Day15: Linked List 1#include <iostream>2#include <cstddef>3usingnamespacestd;4classNode5{6public:7intdata;8Node *next;9Node(intd){10data=d;11next=NULL;12}13};14classSolution{15public:16Node* insert(Node *head,intdata)17{18Node *temp =newNode(data);19if(head ==NULL){20...
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30 Day Challenge Day 6 | Hackerrank: Inserting a Node Into a Sorted Doubly Linked List 题解 很简单的题,要注意检查空节点。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24DoublyLinkedListNode* sortedInsert(DoublyLinkedListNode* head, intdata) {if(!head) {head...
Given a pointer to the head of a linked list, insert a new node before the head. The value in the new node should point to and the value should be replaced with a given value. Return a reference to the new head of the list. The head pointer given may be null meaning that the ini...
与Leetcode上翻转链表(206. Reverse Linked List)思路一致,只不过多了一个“prev”前节点的处理,这种题通过画图比较容易验证。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16DoublyLinkedListNode* reverse(DoublyLinkedListNode*head) {if(!head|| !head->next)returnhead; ...
Nothing but admire: http://fisherlei.blogspot.com/2013/11/leetcode-linked-list-cycle-ii-solution.html classSolution {public: ListNode*detectCycle(ListNode *head) { ListNode dum(0); dum.next =head; ListNode*sp = &dum; ListNode*fp = &dum;while(sp &&fp) ...
An interview problem I encountered years ago.. 1AC classSolution {public:voiddeleteNode(ListNode*node) {if(!node)return; ListNode*p1 =node; ListNode*p2 = node->next;while(p1 &&p2) { p1->val = p2->val;if(!p2->next) { p1->next =nullptr;return; ...
LintCode "Swap Two Nodes in Linked List" <2025年5月> 日一二三四五六 27282930123 45678910 11121314151617 18192021222324 25262728293031 1234567 Nothing special. Just take care of corner cases. View Code
1234567 Visualize the unzip process. classSolution {public: ListNode* oddEvenList(ListNode*head) {if(!head || !head->next)returnhead; ListNode*pOddHead = head, *pEvenHead = head->next; ListNode*pOddTail = pOddHead, *pEvenTail =pEvenHead; ...
Tony's Log LeetCode "Flatten Binary Tree to Linked List" <2025年5月> 日一二三四五六 27282930123 45678910 11121314151617 18192021222324 25262728293031 1234567 Really interesting BST manipulation problem! View Code