LeetCode笔记:371. Sum of Two Integers 问题: Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example: Given a = 1 and b = 2, return 3. 大意: 计算a和b两个整数的和,但是不能用+或-运算符。 比如: 给出 a = 1 和 b = 2,返回...
Leetcode 371. Sum of Two Integers 当相加的进位为负数时,报错: runtime error: left shift of negative value -4 (solution.cpp) SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior prog_joined.cpp:21:23 这是因为 C++ 中对负数的左移没有定义,需要注意定义进位的类型要使用无符号数,这时就可以.....
关键点:利用xor ^ 拿到所有的单一的1;利用and &拿到所有重复的1,就是需要进位的1,利用 << 把1像左进位 1publicclassSolution2{3publicintgetSum(inta,intb)4{5if(b==0)6returna;78intsum = a ^b;9intcarry = (a & b) << 1;1011returngetSum(sum, carry);12}13} 参考资料: http://www.cn...
参数pos是从最低位开始的,比如对bitset<32> i(2);那么i[1]就是1。 bitset可以接收unsigned long long作为构造参数,并且可以用to_ulong()方法返回unsigned long,以及to_ullong()方法返回unsigned long long。 第二步,二进制间加如何运算? 二进制的运算很简单,只需考虑11、10、01、00四种情况,但是对加法来说...
[LeetCode] 371. Sum of Two Integers 题目内容 https://leetcode-cn.com/problems/sum-of-two-integers/submissions/ 不使用运算符 + 和 - ,计算两整数 a 、b 之和。 题目思路 我觉得既然不能使用+-,那么只能进行二进制的运算了。 程序代码......
Can you solve this real interview question? Sum of Two Integers - Given two integers a and b, return the sum of the two integers without using the operators + and -. Example 1: Input: a = 1, b = 2 Output: 3 Example 2: Input: a = 2, b = 3 Output:
1、题目 Calculate the sum of two integersaandb, but you arenot allowedto use the operator+and-. Example: Givena= 1 andb= 2, return 3. Credits: Special thanks to@fujiaozhufor adding this problem and creating all test cases. Subscribeto see which companies asked this question. ...
leetcode_medium_array problem 371. Sum of Two Integers solution #1: code solution #2: one line code. code solution #3: loop; code 参考 1. leetcode_371. Sum of Two Integers; 2. Grandyang; ...
[LeetCode]--371. Sum of Two Integers 简介:Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -.Example: Given a = 1 and b = 2, return 3.Credits: Special thanks to @fujiaozhu for addin...
LeetCode题解——Two Sum 题目地址:https://oj.leetcode.com/problems/two-sum/ Two Sum Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they add up to the target, where...