一:Number of 1 Bits 题目: Write a function that takes an unsigned integer and returns the number of '1' bits it has (also known as the Hamming weight). For example, the 32-bit integer '11' has binary representation 00000000000000000000000000001011, so t…
Write a function that takes an unsigned integer and return the number of '1' bits it has (also known as the Hamming weight). Example 1: Input: 00000000000000000000000000001011 Output: 3 Explanation: The input binary string 000000000000000000000000000…
1.题目 2.思路 方法一:常规方法. 方法二:给面试官惊喜的解法. 3.java代码 方法一代码: public class Solution { // you need to treat n as an unsigned value public int hammingWeight(int n) { int count=0; int flag=1; while(flag!=0){ if((n&flag)!=0) count++; flag=flag<<1; } return cou…
public class Solution { public int HammingWeight(uint n) { var list = new List<uint>(); do { ; list.Add(x); n = n / ; } ); ; ; i < list.Count; i++) { ) { count++; } } return count; } } https://leetcode.com/problems/number-of-1-bits/#/description…
位运算相关 三道题 231. Power of Two Given an integer, write a function to determine if it is a power of two. (Easy) 分析: 数字相关题有的可以考虑用位运算,例如&可以作为筛选器. 比如n & (n - 1) 可以将n的最低位1删除,所以判断n是否为2的幂,即判断(n & (n - 1) == 0) 代码: class Solution { public: bool isPowerOf…
