每日算法之四十五:Merge Two Sorted Lists(合并有序链表) /** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * }; */ class Solution { public: Lis
Link:https://leetcode.com/problems/merge-two-sorted-lists/ 双指针 O(N) 比较两个链表头,把小的拿出来放到新的链表中 # Definition for singly-linked list.# class ListNode:# def __init__(self, val=0, next=None):# self.val = val# self.next = nextclassSolution:defmergeTwoLists(self,l1:...
* Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * } */ public class Solution { public ListNode mergeTwoLists(ListNode l1, ListNode l2) { if(l1==null) return l2; if(l2==null) return l1; ListNode dump ...
/** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * }; */ class Solution { public: ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) { ListNode *cur = new ListNode(-1); ListNode *res = ...
Sort ListSort a linked list in O(n log n) time using constant space complexity. Example 1: Input: 4->2->1->3 Output: 1->2->3->4 Example 2: Input: -1->5->3->4->0 Output: -1->0->3->4->5C+ /** * Definition for singly-linked list. * struct ListNode { * int val...
import heapq # Definition for singly-linked list. # class ListNode: # def __init__(self, x): # self.val = x # self.next = None class Solution: def mergeTwoLists(self, l1: ListNode, l2: ListNode) -> ListNode: # 法一:递归。时间复杂度为O(m+n),空间复杂度也是O(m+n)(每一次递归...
Represent a queue by a singly linked list. Given the current status of the linked list as `1->2->3` where `x->y` means `y` is linked after `x`. Now if `4` is enqueued and then a dequeue is done, the resulting status must be: > Enqueue means chaining aother element to the...
Implement two versions of a generic queue: one using an array and another using a singly linked list. Remember queues are first in first out (FIFO). Implement a priority queue (PQ) in C++ by using an unsorted list. Use an array of 10 elements. Use a circular array, where the next in...
Here you can see that each heap's heap_info is linked through a singly linked list. 1565 + - Since a thread requests a heap, it may be used up and must be applied again. Therefore, one thread may have multiple heaps. Prev records the address of the last heap_info. Here you ...
* Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * } */public ListNodemergeTwoLists(ListNode l1,ListNode l2){if(l1==null)returnl2;if(l2==null)returnl1;ListNode fakeHead=newListNode(0);//pointer是fakeHead对...