invert

题目链接 题目分析 输入顺序即为结点下标，输入内容为结点的左右子树下标 解题思路 1、保存输入结点信息 2、找到根结点（开一个 bool 数组，看哪个结点没有作为子节点出现） 3、构造出二叉树 4、不用再 invert ，遍历时反转顺序即可！ 后记： 其实不用建树，结点保存在数组中，就相当于静态存储，直接可以遍历！ AC程序（C++） /************************** *@Author: 3stone *@ACM: PAT.A1102 Invert a Binary Tree *@Time: 18/7/26 *@IDE: VSCode 2018 + clang ***************************/ # include <cstdio> # include <queue> # include <cstring> using namespace std ; struct tree_key { int lkey , rkey ; } key [ 20 ] ; struct Node { Node * lchild ; Node * rchild ; int data ; } ; //构造二叉树 Node * create ( int k ) { //递归基 无左右子树 if ( k == - 1 ) return NULL ; Node *

I am trying to create a font/glyph by: taking a bitmap image creating an SVG with autotrace (on Linux) importing the outline as a glyph with python-fontforge (glyph.importOutlines(svgfile) ) This works fine except that the resulting glyph in inverted (see images). Any idea how this can be prevented, how the SVG or glyph can be inverted, or anything like that? Source bitmap: Autotraced SVG: Resulting font: solved this simply by using potrace instead of autotrace. for reference, these are the steps: convert bitmap to svg (linux command line): potrace -s sourceimg.bmp use svg as glyph (python):

I'm looking for a way to invert arbitrary NSColor values at runtime, and there doesn't appear to be any built-in method to do so. I will be using a category to extend NSColor as follows: NSColor * invertedColor = [someOtherColor inverted]; Here is the category method prototype that I am using: @implementation NSColor (MyCategories) - (NSColor *)inverted { NSColor * original = [self colorUsingColorSpaceName: NSCalibratedRGBColorSpace]; return ...? } @end Can anyone fill in the blanks? This doesn't have to be perfect, but I would like it to make some sense. i.e.: [[[NSColor someColor] inverted]

Calling invert turns the image backwards right to left, i.e. it exchanges the first column for the last column, the second column for the second to last column, and so on until the entire image is reversed. Calling exchange swaps the image area defined by a rectangle with width 180 and height 130 starting at row index 50 and column index 60 for a rectangle of the same size starting at row index 50, and column index 260. Calling shift finds an image which is hidden in the image data, by saving bit 7, shifting bits 0-6 one position to the left, and setting bit 0 to the previously saved value of

以下iptables命令查看ipvs匹配扩展的帮助信息。可匹配的字段分别为：虚拟服务的协议号、地址、端口、数据流的方向、转发模式以及控制连接的端口号。对于类似FTP的服务，其控制连接的端口为21，数据端口为20。 $ iptables -m ipvs --help iptables v1.6.0 IPVS match options: [!] --ipvs packet belongs to an IPVS connection Any of the following options implies --ipvs (even negated) [!] --vproto protocol VIP protocol to match; by number or name, e.g. "tcp" [!] --vaddr address[/mask] VIP address to match [!] --vport port VIP port to match; by number or name, e.g. "http" --vdir {ORIGINAL|REPLY} flow direction of packet [!] --vmethod {GATE|IPIP|MASQ} IPVS forwarding method used [!] --vportctl port VIP