[LeetCode] Number of 1 Bits 位1的个数 Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as theHamming weight). For example, the 32-bit integer ’11' has binary representation00000000000000000000000000001011, so the function should return ...
基本问题太简单,摘一个leetcode中的解法 Explanation: The best solution for this problem is to use "divide and conquer" to count bits: First, count adjacent two bits, the results are stored separatedly into two bit spaces; Second is to count the results from each of the previous two bits an...
LeetCode Top Interview Questions 191. Number of 1 Bits (Java版; Easy) 题目描述 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 bin...
packageleetcode.easy;publicclassNumberOf1Bits{// you need to treat n as an unsigned valuepublicinthammingWeight1(intn){intbits=0;intmask=1;for(inti=0;i<32;i++){if((n&mask)!=0){bits++;}mask<<=1;}returnbits;}publicinthammingWeight2(intn){intsum=0;while(n!=0){sum++;n&=(n-...
https://leetcode.com/problems/number-of-1-bits/description/ 题目描述 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 ...
Input: n = 00000000000000000000000010000000 Output: 1 Explanation: The input binary string 00000000000000000000000010000000 has a total of one '1' bit. Example 3: Input: n = 11111111111111111111111111111101 Output: 31 Explanation: The input binary string 11111111111111111111111111111101 has a total of thirty...
leetcode 200:Number of Islands 思路:深度优先搜索,两层循环遍历一遍grid,若该网格为1则进行深度优先搜索并将走过的结点的visit置1,记录连接分量的个数。 class Solution { public: void search(vector<vector<char>>& grid, int i, int j, vector<vector<int>>& visit){ visit[i][j] = 1; int d[]...
191 Number of 1 Bits https://leetcode-cn.com/problems/number-of-1-bits/ https://leetcode.com/problems/number-of-1-bits/description/ Write a function that takes an unsigned integer and return the number of '1' bits it has (also known as the Hamming weight). ...
Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate number must exist. Assume that there is only one duplicate number, find the duplicate one. Note: You must not modify the array (assume the array is read ...
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