Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation. Note: The given integer is guaranteed to fit within the range of a 32-bit signed integer. You could assume no leading ze…

给定一个正整数,输出其补码. 思路:利用mask掩码进行异或, 利用 temp >> 1 大于0 来决定mask长度,求出的mask 为二进制 1 0 0 0 0类型,                                          mask -1为 0 1 1 1 1 ,可作为掩码,与num 进行异或. 例如: num = 5 二进制:    num:     0 1 0 1   mask :     1 0 0 0          mask-1:         1 1…

这是悦乐书的第240次更新,第253篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第107题(顺位题号是476).给定正整数,输出其补码数.补充策略是翻转其二进制表示的位.例如: 输入:5 输出:2 说明:5的二进制表示为101(无前导零位),其补码为010,因此需要输出2. 输入:1 输出:0 说明:1的二进制表示形式为1(无前导零位),其补码为0,因此需要输出0. 注意: 保证给定的整数适合32位有符号整数的范围. 您可以假设整数的二进制表示中没有前导零位. 本…

Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded by…

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 the function should retu…

题目就是: 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 the function shoul…

1.题目描述 2.题目分析 使用 C++的 bitset 库进行操作: 3.代码 int findComplement(int num) { bitset<> b(num); string s = b.to_string(); string::iterator it = s.begin() ; while( it != s.end() ){ ' ) break; ++it; } if( it == s.end() ){ s = "; }else{ s.assign(it,s.end(…

Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation. 給一個正整數,算出他的二補數 (2's complement). 二補數就是將該數字的二進制碼全部翻轉過來. Note: The given integer is guaranteed to fit within the range of…

problem 476. Number Complement solution1: class Solution { public: int findComplement(int num) { //正数的补数是对应二进制各位翻转,且从非零高位开始. bool start = false; ; i>=; i--)//err. { <<i)) start = true; <<i); } return num; } }; 参考 1. Leetcode_476. Number Com…

LeetCode--Number Complement Question Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation. Note: The given integer is guaranteed to fit within the range of a 32-bit signed in…