palindrome Python 字符串反转string[::-1] Slice notation "[a : b : c]" means "count in increments of c starting at a inclusive, up to b exclusive". If c is negative you count backwards, if omitted it is 1. If a is
⭐ Leetcode 解題紀錄 ⭐題型資料結構Python SolutionC++ SolutionNote ⭐BFS 相關題型 ⭐ 104 Maximum Depth of Binary Tree BFS (分層) Python 94 Binary Tree Inorder Traversal BFS (分層) Tree Python 內含 處理 Tree 樹問題的重點 102 Binary Tree Level Order Traversal BFS (分層) Tree Python ...
三、代码 1#Definition for singly-linked list.2#class ListNode:3#def __init__(self, x):4#self.val = x5#self.next = None67classSolution:8#@param {ListNode} head9#@return {boolean}10defisPalindrome(self, head):11start = p = q = r =ListNode(0)12start = p =head13length =014isO...
/** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val... 9. Palindrome Number 9. Palindrome Number 题目 题目解析:判断一个数字是不是回文数。 回文数的定义如下:一个数字和它倒置以后相等,则为回文数。 要求:无需额外的空间 要注...
Check Palindrome in Python Using List Slicing Example # Enter stringword=input()# Check for palindrome strings using list slicingifstr(word)==str(word)[::-1]:print("Palindrome")else:print("Not Palindrome") The program begins by prompting the user to input a string using theinput()function...
# Definition for singly-linked list. # class ListNode: # def __init__(self, x): # self.val = x # self.next = None class Solution(object): def isPalindrome(self, head): """ :type head: ListNode :rtype: bool """ node_list=[] while head: node_list.append(head) head=head.ne...
# Definition for singly-linked list.# class ListNode:# def __init__(self, x):# self.val = x# self.next = Noneclass Solution:def isPalindrome(self, head: ListNode) -> bool:if head == None:return True# 1、复制链表 head 为 head1# dummy、dummy1 不断后移,head、head1 不动head1 ...
The following codes in space O(1). #Definition for singly-linked list.#class ListNode(object):#def __init__(self, x):#self.val = x#self.next = NoneclassSolution(object):defisPalindrome(self, head):""":type head: ListNode :rtype: bool"""#two pointer techniquefast = slow =head#fi...