题目: Problem Description Coco has a tree, whose vertices are conveniently labeled by 1,2,…,n.There are m chain on the tree, Each chain has a certain weight. Coco would like to pick out some chains any two of which do not share common vertices.Find out…
标签: 位运算 描述 Write a function that add two numbers A and B. You should not use + or any arithmetic operators. 解题思路: 利用位运算来解决A+B的问题,可以将此问题转化为解决不进位相加和进位(carry bit)的两部分问题: 1. 首先是不进位相加:_A = A^B 先对A和B进行异或运算(XOR manupitation) , A 和B 中两位不相同的变为1,相同的变为 0, 同为1是不…