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@kidultff

PAT-A 真题- 1043. Is It a Binary Search Tree

原题干：A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties:The left subtree of a node contains only nodes with keys less than the node's key.The right subtree of a node conta ...
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@kidultff

C语言-二叉查找树（BST）

0x00、二叉查找树的递归定义    二叉查找树（二叉搜索树、二叉排序树、排序二叉树、Binary Search Tree，BST）是一种特殊的二叉树。递归定义如下：●若二叉查找树没有任何节点，则二叉查找树为空树●若二叉查找树不是空树，则二 ...
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@kidultff

PAT-A 真题- 1053. Path of Equal Weight

原题干：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 of the weights of all the nodes along the path from R to any l ...
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@kidultff

Linux查找含有某些字符串的所有文件

批量查找文件内容：find . -name "*.log" | xargs grep "fatal"这里*.log指的是要找的文件的后缀名，fatal是要找的内容。
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@kidultff

CentOS升级/安装PHP7.1

首先卸载旧版本PHP：yum remove php*接着安装epel：yum -y install epel-release更新软件源（centos自带的软件源没有PHP7）：根据系统版本安装！！//Centos 5.X：     rpm -Uvh http ...
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