Reverse Bits

Reverse bits of a given 32 bits unsigned integer.

For example, given input 43261596 (represented in binary as 00000010100101000001111010011100), return 964176192 (represented in binary as00111001011110000010100101000000).

Follow up:
If this function is called many times, how would you optimize it?

python代码：

from string import atoi
class Solution:
# @param n, an integer
# @return an integer
     def reverseBits(self, n):
          n_str=bin(n)[2:].zfill(32)[-1::-1]    #利用bin内建函数将n转换为二进制字符串，利用切片删掉前缀0b，并将其扩充至32位，然后在反转
          n_int=string.atoi(n_str,2)　　　　   #将翻转后的二进制字符串转换为整形
          return n_int

leetcode reverse bits python的更多相关文章

  1. 2016.5.16——leetcode:Reverse Bits（超详细讲解）

    leetcode:Reverse Bits 本题目收获 移位(<<  >>), 或(|),与(&)计算的妙用 题目: Reverse bits of a given 3 ...

  2. [LeetCode] Reverse Bits 翻转位

    Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in ...

  3. [leetcode] Reverse Bits

    Reverse Bits Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (re ...

  4. LeetCode Reverse Bits 反置位值

    题意:给定一个无符号32位整数,将其二进制形式左右反置,再以整型返回. 思路:循环32轮,将n往右挤出一位就补到ans的尾巴上. class Solution { public: uint32_t r ...

  5. [LeetCode] Reverse Bits 位操作

    Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in ...

  6. leetcode Reverse Integer python

    class Solution(object): def reverse(self, x): """ :type x: int :rtype: int "&quo ...

  7. lc面试准备:Reverse Bits

    1 题目 Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represente ...

  8. 【LeetCode】190. Reverse Bits 解题报告（Python & C++）

    作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 解题方法 二进制字符串翻转 位运算 日期 题目地址:https://le ...

  9. [LeetCode] 190. Reverse Bits 翻转二进制位

    Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in ...

随机推荐

  1. LintCode "Post Office Problem" !!!

    * Non-intuitive state design class Solution { public: /** * @param A an integer array * @param k an ...

  2. 剑指offer系列27--表示数值的字符串

    [题目]请实现一个函数用来判断字符串是否表示数值(包括整数和小数). 例如,字符串”+100”,”5e2”,”-123”,”3.1416”和”-1E-16”都表示数值. 但是”12e”,”1a3.14 ...

  3. Learning Puppet — Resource Ordering

    Learning Puppet — Resource Ordering Learn about dependencies and refresh events, manage the relation ...

  4. webApi文档好帮手-apidoc使用教程

    来源:http://blog.csdn.net/xumin198908/article/details/41964159 在开发后台接口的过程中,我们肯定要提供一份api接口文档给终端app. 目前大 ...

  5. s3c2440存储控制器和地址以及启动的理解

    转自:http://blog.sina.com.cn/s/blog_5ddb672b0100fkcf.html 1.首先应该先了解Flash ROM的种类 NOR FLASH地址线和数据线分开,来了地 ...

  6. MongoDB：Replica Set 之操作日志 Oplog

    转载地址:http://francs3.blog.163.com/blog/static/4057672720121133328120/ 之前的blog  学习了 MongoDB 主从搭建,以及节点管 ...

  7. 黄聪：走进wordpress do_action函数

    再看do_action函数.位于plugin.php352行.我把源码放在西街口这里,略去了其它辅助处理的语句. 如下: function do_action($tag, $arg = '') {   ...

  8. 5. redis管道, 发布订阅, 模拟队列

    一. 发布订阅 #订阅scribe 127.0.0.1:6379> SUBSCRIBE "channel_1" Reading messages... (press Ctrl ...

  9. (C#) What is the difference between "const" and "static readonly" ?

    const int a must be initialized initialization must be at compile time readonly int a can use defaul ...

  10. OpenCV实现KNN算法

    原文 OpenCV实现KNN算法 K Nearest Neighbors 这个算法首先贮藏所有的训练样本,然后通过分析(包括选举,计算加权和等方式)一个新样本周围K个最近邻以给出该样本的相应值.这种方 ...