Yohoc

摘要： 1. 以引用或指针形式传入: cpp void foo(std::vector<int> &vec); // 以引用形式传入 void bar(std::vector<int> *ptr); // 以指针形式传入 这种方式不会复制vec,函数内操作的是vec本身。可以改变vec。例如: cpp st 阅读全文

摘要： 题目： Given a non-empty tree with root R, and with weight Wi​assigned to each tree node Ti​. The weight of a path from R to L is defined to be the sum o 阅读全文

摘要： 题目： The following is from Max Howell @twitter: Google: 90% of our engineers use the software you wrote (Homebrew), but you can't invert a binary tree 阅读全文

摘要： 题目： An inorder binary tree traversal can be implemented in a non-recursive way with a stack. For example, suppose that when a 6-node binary tree (with 阅读全文

摘要： 题目： A family hierarchy is usually presented by a pedigree tree where all the nodes on the same level belong to the same generation. Your task is to fi 阅读全文

摘要： 二维都变长的二维容器数组 1、在C++中,可以这样初始化一个二维vector数组并指定大小: cpp vector<vector<int>> vec(3, vector<int>(4)); 这个代码会创建一个3行4列的二维vector数组,每个元素初始化为0:vec = [0 0 0 0][0 0 阅读全文

摘要： 题目： Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed t 阅读全文

摘要： One important factor to identify acute stroke (急性脑卒中) is the volume of the stroke core. Given the results of image analysis in which the core regions 阅读全文

摘要： 题目： The K−P factorization of a positive integer N is to write N as the sum of the P-th power of K positive integers. You are supposed to write a progr 阅读全文

摘要： 题目： Weibo is known as the Chinese version of Twitter. One user on Weibo may have many followers, and may follow many other users as well. Hence a soci 阅读全文