Series of articles on the beauty of mathematics, google
Foreword Maybe you don’t believe that mathematics is the best tool to solve information retrieval and natural language processing. It describes practical problems in these areas very clearly and provides beautiful solutions. Whenever people apply mathematical tools to solve a language problem, they always marvel at the beauty of mathematics. We hope to use the Google Chinese Blackboard to introduce some mathematical tools and how we use these tools to develop Google products. Series 1: Statistical Language Models Google’s mission is to integrate the world’s information, so we have always been committed to It focuses on studying how to allow machines to best understand and process information and language. For a long time, humans have been dreaming of allowing machines to replace humans in translating languages, recognizing speech, understanding text (whether printed or handwritten), and automatically retrieving massive documents. This requires machines to understand language. But human language is arguably the most complex and dynamic part of information. In order to solve this problem, the easy way people think of is to let the machine simulate humans to learn – learn human grammar, analyze sentences, etc. Especially after Noam Chomsky (the greatest linguist in history) proposed “formal language”, people became…
Baidu, Google, and I have been unable to find IIS for a long time because ServerFarms reported 404, 502, 503 and other solutions.
Because I’m bored, I just toyed with IIS, First, I visited the site under my IIS. . http://localhost:80 OK, no problem. . Successful access Then my sharp eyes saw that there was a Server Farms on IIS that I had ignored for a long time. It had no child nodes and was empty. Then I went to right-click “Create Server Farms…” After Add Server. . Looking left and right, I didn’t find anything new. . Continue to visit http://localhost:80. A cup of tea happened, huh~~What a situation? The legendary 404? ? Then delete the Server Farms subnode just created. 404 is solved, the problem comes again, report 502.2? ? Okay, create the Server Farms subnode again. Still reporting 404. This time, deactivate the newly created Server Farms subnode instead of deleting it. The result is reported as 502.3. Something’s wrong. Delete the Server Farms subnode again. The mouse moves aimlessly to the IIS root node, which is the node with your computer name. . Right click, hmm, when you see the word “stop”, OK, click stop. Click “Start” again. . Visit http://localhost:80 again and the problem is solved. Oh yeah! ! !
【LeetCode】All paths of binary treesEasy(FB,Google)
All paths in a binary tree Given a binary tree，find all paths from the root node to the leaf nodes. Example Given the following binary tree： 1 / \ 2 3 \ 5 All paths from roots to leaves are： [ “1->2->5”, “1->3” ] Tags Binary tree Binary tree traversal Google Facebook Related topics Medium binary tree with the longest path with the same value /*** Definition of TreeNode:* public class TreeNode {* public int val;* public TreeNode left, right;* public TreeNode(int val) {* this .val = val;* this.left = this.right = null;* }* }*/public class Solution {/** @param root: the root of the binary tree* @return: all root-to-leaf paths*/public List binaryTreePaths(TreeNode root) {List paths = new ArrayList();if(root == null ){return paths;}//Devide ConquerList leftPaths = binaryTreePaths(root .left);List rightPaths = binaryTreePaths(root.right);for(String path : leftPaths){paths.add(root.val & #43; “->” + path);}for(String path : rightPaths) {paths.add(root.val + “->” + path);}// root is a leafif(paths.size()==0 span>){paths.add(“” + root.val);}return paths ;}}②public class Solution {/*** @param root the root of the binary tree* @return all root-to-leaf paths*/public List binaryTreePaths(TreeNode root) {List result = new ArrayList();if (root == null) {return result;}helper(root, String.valueOf(root.val), result);return result;}private void helper span>(TreeNode root, String path, List result) {if (root == null) {return;}if (root.left…
Open source Android malware steals users’ private information, Google
Leifeng.com (Public account: Leifeng.com) According to news on August 24, the security research organization ESET discovered for the first time the malicious information theft behavior of open source Android spyware on Google Play, and it was deleted after It still appears repeatedly on Google Play. It is reported that the first spyware is an instance of spyware based on the open source spy tool AhMyth lurking in a broadcast application on Google Play. The application is Radio Balouch, detected as Android/Spy.Agent.AOX. On the surface, Radio Balouch is an internet radio app, however an investigative team led by ESET researcher Lukas Stefanko found that the app was designed to spy on people who downloaded it. While the app did have a playback section for songs by artists such as suroz and benju, the spyware hidden within the app began stealing contact information and collecting files stored on the affected devices. ESET sent a report to Google detailing its findings. Google’s security team removed the malicious Radio Balouch app within 24 hours, but 10 days later the original developer had republished it on Google Play. Stefanko said: “We also detected and reported a second instance of this malware, and then discovered that…
