Given a 32-bit signed integer, reverse digits of an integer. 将32位整数反向输出. Note:Assume we are dealing with an environment which could only store integers within the 32-bit signed integer range: [−231,  231 − 1]. For the purpose of this problem, assume…

Determine whether an integer is a palindrome. Do this without extra space. 判断一个整数是不是回文整数(例12321).不能使用多余的空间. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the restriction of…

9.Palindrome Number 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…

Question:Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 Have you thought about this? Here are some good questions to ask before coding. Bonus points for you if you have already thought through this! If the…

Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note:Assume we are dealing with an environment which could only hold integers within t…

题目意思:判断是否为回文数,不许使用额外空间 ps:一直不理解额外空间的意思,int能用吗 思路:1.比较头尾 2.翻转,越界问题需考虑 class Solution { public: bool isPalindrome(int x) { )return false; )return true; ,temp=x; while(temp){ num++; temp=temp/; } while(x){ start=x/,num-)); end=x%; if(start!=end)return f…

7.Reverse Integer Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note:Assume we are dealing with an environment which could only stor…

7.Reverse Integer Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: Output: Example 2: Input: - Output: - Example 3: Input: Output: Note:Assume we are dealing with an environment which could only hold integers within the…

给定一个 32 位有符号整数,将整数中的数字进行反转. 示例 1: 输入: 123 输出: 321  示例 2: 输入: -123 输出: -321 示例 3: 输入: 120 输出: 21 注意: 假设我们的环境只能存储 32 位有符号整数,其数值范围是 [−231,  231 − 1].根据这个假设,如果反转后的整数溢出,则返回 0. ===============================================================================…

Reverse digits of an integer. Returns 0 when the reversed integer overflows (signed 32-bit integer). Have you met this question in a real interview?     Example Given x = 123, return 321 Given x = -123, return -321 LeetCode上的原题,请参见我之前的博客Reverse Integ…

题目:Reverse Integer 难度:Easy 题目内容: Given a 32-bit signed integer, reverse digits of an integer. Note:Assume we are dealing with an environment which could only hold integers within the 32-bit signed integer range. For the purpose of this problem, assum…

7. Reverse Integer Total Accepted: 153147 Total Submissions: 644103 Difficulty: Easy Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 思路: 本题思路很简单,有多种方法:要注意的就是判断反转之后的结果是否超出了int类型的范围. 第一种是直接对10取余和除,然后每加一位,就将原先…

7. Reverse Integer Total Accepted: 153147 Total Submissions: 644103 Difficulty: Easy Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 思路: 本题思路很简单,有多种方法:要注意的就是判断反转之后的结果是否超出了int类型的范围. 第一种是直接对10取余和除,然后每加一位,就将原先…

我现在在做一个叫<leetbook>的开源书项目,把解题思路都同步更新到github上了,需要的同学可以去看看 书的地址:https://hk029.gitbooks.io/leetbook/ 007. Reverse Integer[E]——处理溢出的技巧 题目 Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 思路 这题完全没丝毫的难度,任何人几分钟都可以写…

题目来源:https://leetcode.com/problems/reverse-integer/ Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 解题思路: 其实这道题看起来非常简单,要实现也是几行代码的事.但是有个小问题容易被忽略,就是边界问题.什么意思呢?如果我们输入的整数超出了int的表达范围,这个问题要怎么解决呢? 用比int更大的数据类型存储我们转…

1. 问题描述 Reverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -321 click to show spoilers. Have you thought about this?Here are some good questions to ask before coding. Bonus points for you if you have already thought…

Reverse Integer Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 若反转的数溢出,直接返回0 可以用计算结果来判断溢出,也可以用因数来判断 Java代码实现: public class ReverseInteger { public static int reverseInt(int x){ if (x == 0) { return 0; } int…

Reverse Integer Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 click to show spoilers. Have you thought about this? Here are some good questions to ask before coding. Bonus points for you if you have alread…

1006. 换个格式输出整数 (15) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 8000 B 判题程序 Standard 作者 CHEN, Yue 让我们用字母B来表示“百”.字母S表示“十”,用“12...n”来表示个位数字n(<10),换个格式来输出任一个不超过3位的正整数.例如234应该被输出为BBSSS1234,因为它有2个“百”.3个“十”.以及个位的4. 输入格式:每个测试输入包含1个测试用例,给出正整数n(<1000). 输出格式:每个测试用例的输出占一…

Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note: Assume we are dealing with an environment which could only hold integers within…

7. Reverse Integer 题目描述: Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note: Assume we are dealing with an environment which could o…

六月箴言 万物之中,希望最美:最美之物,永不凋零.—— 斯蒂芬·金 第二周算法记录 007 -- Reverse Integer (整数反转) 题干英文版: Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123Output: 321 Example 2: Input: -123Output: -321 Example 3: Input: 120Output: 21 Note:Assum…

 反向位整数 序号:#30难度:一般时间限制:1000ms内存限制:10M 描述 输入32位无符号整数,输出它的反向位. 例,输入4626149(以二进制表示为00000000010001101001011011100101),返回2808701440(以二进制表示为10100111011010010110001000000000). 输入 一个无符号32位整数字符串 输出 一个无符号32位整数,为输入整数的反向位 输入样例 4626149 复制样例 输出样例 2808701440 #inclu…

7. Reverse Integer Easy Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note: Assume we are dealing with an environment which could on…

今天的两道题关于基本数据类型的探讨,估计也是要考虑各种情况,要细致学习 7. Reverse Integer Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 Have you thought about this? Here are some good questions to ask before coding. Bonus points for you if…

Content 给定一个三位数,请反向输出它. 数据范围:数值在 \(100\) 到 \(999\) 之间. Solution 如果我们把它当做是一个字符串来读入的话,这道题目就很简单了.STL 当中有一个函数叫做 reverse()(在 algorithm 库里面),他可以把当前的一组数据翻转过来,比如说 helloworld 使用 reverse() 函数之后就会变成 dlrowolleh. 因此,我们把这个三位数当做是一个字符串读入,然后直接 reverse 一下输出就好了.具体实现见代码…

今天做了下LeetCode上面字符串倒序的题目,突然想Python中字符串倒序都有哪些方法,于是网上查了下,居然有这么多种方法: 个人觉得,第二种方法是最容易想到的,因为List中的reverse方法比较常用,做LeetCode题目7. Reverse Integer也用了这种方法,程序耗时65ms #字符串的反转 #用到for循环的步长参数,从大到小循环,到0为止 def reverse1 (s): rt = '' for i in range(len(s)-1, -1, -1): rt +=…

Reverse Integer Reverse digits of an integer. Example1: x =  123, return  321 Example2: x = -123, return -321 click to show spoilers. Have you thought about this? Here are some good questions to ask before coding. Bonus points for you if you have alr…

1006. 换个格式输出整数 (15) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 8000 B 判题程序 Standard 作者 CHEN, Yue 让我们用字母B来表示“百”.字母S表示“十”,用“12...n”来表示个位数字n(<10),换个格式来输出任一个不超过3位的正整数.例如234应该被输出为BBSSS1234,因为它有2个“百”.3个“十”.以及个位的4. 输入格式:每个测试输入包含1个测试用例,给出正整数n(<1000). 输出格式:每个测试用例的输出占一…

1006. 换个格式输出整数 (15) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 8000 B 判题程序 Standard 作者 CHEN, Yue 让我们用字母B来表示“百”.字母S表示“十”,用“12...n”来表示个位数字n(<10),换个格式来输出任一个不超过3位的正整数.例如234应该被输出为BBSSS1234,因为它有2个“百”.3个“十”.以及个位的4. 输入格式:每个测试输入包含1个测试用例,给出正整数n(<1000). 输出格式:每个测试用例的输出占一…