190Reverse Bits
来源：互联网 发布：sql学生成绩表 编辑：程序博客网 时间：2024/05/18 15:28
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?
Related problem: Reverse Integer
uint32_t reverseBits(uint32_t n) { unsigned char arr[4]; int i = 0; arr[0] = ((unsigned char*)&n)[3]; arr[1] = ((unsigned char*)&n)[2]; arr[2] = ((unsigned char*)&n)[1]; arr[3] = ((unsigned char*)&n)[0]; for(int i=0; i<4; i++) { arr[i] = (arr[i] & 0x55) << 1 | (arr[i] & 0xAA) >> 1; arr[i] = (arr[i] & 0x33) << 2 | (arr[i] & 0xCC) >> 2; arr[i] = (arr[i] & 0x0F) << 4 | (arr[i] & 0xF0) >> 4; } return *((uint32_t*)arr);}600 / 600 test cases passed.
Status: Accepted
Runtime: 4 ms
0 0
- leetCode #190 reverse bits
- 190Reverse Bits
- LeetCode 190 Reverse Bits
- 190 Reverse Bits
- [LeetCode][190][Reverse Bits]
- LeetCode(190) Reverse Bits
- [LeetCode 190]Reverse Bits
- LeetCode #190 Reverse Bits
- [leetcode 190]Reverse Bits
- LeetCode 190 Reverse Bits
- leetCode 190-Reverse Bits
- leetcode-190 Reverse Bits
- LeetCode 190 Reverse Bits
- leetcode 190 Reverse Bits
- 190Reverse Bits
- 190 Reverse Bits
- LeetCode 190 :Reverse Bits
- 【leetcode 190 Reverse Bits 】
- sqlite数据库常用函数
- Codeforces 479c (五一训练 I）
- http and https
- Java 安全套接字编程以及 keytool 使用最佳实践
- 黑马程序员——java-模式（工厂模式，单列模式，适配器模式）
- 190Reverse Bits
- 在MyEclipse中更换或修改svn的用户名和密码
- linux平台学x86汇编（四）：从“hello world！”开始
- fibinaci数列，储存到动态分配空间
- 《从DOS和UNIX两个方向开始谈现代操作系统的恩怨情仇》
- 了解预定义变量$_SERVER
- （连载）Java基础学习008
- javascript中的浅拷贝和深拷贝
- 5.6号全排列
