easy题
题目:
Reverse bits of a given 32 bits unsigned integer.
For example, given input 43261596 (represented in binary as 00000010100101000001111010011100), return 964176192 (represented in binary as 00111001011110000010100101000000).
将一个无符号整数的位反转3msAC解:
class Solution
{
public:
uint32_t reverseBits(uint32_t n)
{
uint32_t x = 0;
for(int i = 0;i < 31;i++)
{
x = (n & 0x00000001) | x;
x <<= 1;
n >>= 1;
}
return (n & 0x00000001) | x;
}
};
本文介绍了一种高效的32位无符号整数位反转算法,该算法能够在3毫秒内完成计算。通过逐位操作,实现从最低位到最高位的反转,最终返回反转后的整数值。
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