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PAT(甲级)1143. Lowest Common Ancestor(30)

PAT 1143. Lowest Common Ancestor(30) The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) is recursively defined as a binary tree which has the following properties: 1.The left subtree of a node contains only nodes with keys less than the node’s key. 2.The right subtree of a node contains only nodes with keys greater than or equal to the node’s key. 3.Both the left and right subtrees must also be binary search trees. Given any two nodes in a BST, you are supposed to find their LCA. 输入格式: Each input file contains one test case. For each case, the first line gives two positive integers: M (≤ 1,000), the number of pairs of nodes to be tested; and N (≤ 10,000), the number of keys in the BST, respectively. In the second line, N distinct integers are given as the preorder traversal sequence of the BST. Then M lines follow, each contains a pair of integer keys U and V. All the keys are in the range of int.

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PHP 常见安装错误configure error xml2-config not found. please check your libxml2 installation

configure error xml2-config not found. please check your libxml2 installation sendos 5.5 安装 PHP 5.4.3 报 configure error xml2-config not found. please check your libxml2 installation 错误 检查是否安装了libxm包 [root@rh-linux software]# rpm -qa |grep  libxml2 libxml2-2.6.26-2.1.12 libxml2-python-2.6.26-2.1.12 重新安装libxml2和libxml2-devel包, yum安装的时候发现新版本会提示更新,需要更新的可以更新,不要跳过就行了。 [root@rh-linux /]# yum install libxml2 [root@rh-linux /]# yum install libxml2-devel -y ——————————————————------———————————————— configure: error: xslt-config not found. Please reinstall the libxslt >= 1.1.0 distribution yum install libxslt-devel ————————————————————————————————————

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