public boolean isPalindrome(int x) { if(x < 0 || (x % 10 == 0 && x != 0)) return false; int revertedNumber = 0; while(x > revertedNumber) { revertedNumber = revertedNumber * 10 + x % 10; x /= 10; } return x == revertedNumber || x == revertedNumber/10; } 时间复...
Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome. Example 3: Input: 10 Output: false Explanation: Reads 01 from right to left. Therefore it is not a palindrome. My solution(10ms,36.5MB) 整形转换成字符型,然后进行颠...
leetcode第九题--Palindrome Number Problem: Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the restriction of using e...
palindrome-number: 回文数 , 简单理解就是对称数 解决: 每次取到第一个数和最后一个数进行对比, 对比后把首尾去掉,直到原数据为0 classSolution{funcisPalindrome(_x:Int)->Bool{ifx<0{returnfalse}vardiv=1varnum=xwhile(num/div>=10){div=div*10}while(num!=0){letleft=num/divletright=num%10ifleft!
[LeetCode] Palindrome Number 验证回文数字 Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the restriction of using ...
[LeetCode] 9. Palindrome Number (easy) Welcome To My Blog 9. Palindrome Number (easy) 题目要求:检查给定的数字是否是回文数字 我的做法:把每个数字都存起来,然后首尾比较,从两头一直比到中间,这样做可以防止溢出(事实上没必要考虑溢出,因为对于正数来说,溢出后就是负数了,肯定不相等),时间复杂...
【LeetCode】Palindrome Number 解题报告标签(空格分隔): LeetCode题目地址:https://leetcode.com/problems/palindrome-number/#/description题目 字符串 回文 回文数 题解 Leetcode leetcode 5:最长回文子串 题目描述Givenastrings,findthelongestpalindromicsubstringins.Youmayassumethatthemaximumlengthofsis1000.Example...
Determine whether an integer is a palindrome. Do this without extra space. 大意: 判断一个整数是否是回文。不使用额外的空间来完成。 思路: 这道题目很简单,只有一句话,不要要求不使用额外空间,一般来说不使用额外空间的意思是不使用复杂度为O(n)的额外空间,新建一些字符串、整型值之类的还是可以的。回文的...
Palindrome Number 陌儿的百科全书 题目: Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Input: 121 Output: true Example 2: Input: -121 Output: false Explanation: From left to right, it reads -121. From ...
Find all Missing Numbers (easy) Find the Duplicate Number (easy) Find all Duplicate Numbers (easy) 6. Pattern: In-place Reversal of a LinkedList,链表翻转 在众多问题中,题目可能需要你去翻转链表中某一段的节点。通常,要求都是你得原地翻转,就是重复使用这些已经建好的节点,而不使用额外的空间。这个时...