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 (两数之和) Calculate the sum of two integersaandb, but you are not allowed to use the operator+and-. Example: Givena= 1 andb= 2, return 3. 题目标签:Bit Manipulation 这道题目让我们做两数之和,当然包括负数,而且不能用+,-等符号。所以明显是让我们从...
一共4种情况,用实例说明,假使两个int绝对值为1和2,这4种情况及其处理如下: 1 + 2 = plus(1, 2) = 3 1 + (-2) = minus(1, 2) = -minus(2, 1) = -1 (-1) + 2 = minus(2, 1) = 1 (-1) + (-2) = -puls(1, 2) = -3 也就是说关键是uint的加减法。 第一步,要转换成二...
【Leetcode】Sum of Two Integers https://leetcode.com/problems/sum-of-two-integers/ 题目: 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. 思路: 唉,这题虽然是easy,但是真好烦的一题,之前...
题目地址:https://leetcode.com/problems/sum-of-two-integers/description/ 题目描述 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. ...
# https://leetcode.com/problems/sum-of-two-integers/discuss/84282/Python-solution-with-no-%22+-*%22-completely-bit-manipulation-guaranteed # 知识点:有符号long int共32bits,符号占1bits,故取值范围为-2**31~2**31-1 MAX = 0x7FFFFFFF # 16进制7为0111,F为1111,即2**31-1,这个代表了long...
leetcode-371-Sum of Two Integers 题目描述: Calculate the sum of two integersaandb, but you are not allowed to use the operator+and-. Example: Givena= 1 andb= 2, return 3. 要完成的函数: int getSum(int a, int b) 说明: 1、这道题目其实要实现二进制的加法,我们可以用异或实现,十分...
https://discuss.leetcode.com/topic/49764/0ms-ac-java-solution sum 求出不进位的话应该的结果。 然后(a & b) 可以求出每一位的进位结果。 然后左移一位,把这些进位的数给最终结果加进去。 用个递归。 差不多就这么意思。 bit manipulation 感觉都是耍耍小聪明,没什么意思。
Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given nums = [2, 7, 11, 15], target = 9, ...
leetcode371: Sum of 2 Integers 题目描述: Calculate the sum of two integers a and b, but you arenot allowedto use the operator+and-. Example: Given a = 1 and b = 2, return 3. 网上流传最广的方法: 原理:使用异或操作可以进行二进制不带进位的加减,与操作可以得到进位。