Authentication using OAuth 使用OAuth进行身份验证 OAuth is an open protocol to allow secure authorization in a simple and standard method from web, mobile, and desktop applications. OAuth is used to authenticate a client against common web-services such as G
Never Say Die. Hang on to your dream. Design Thinking. Thinking is more important than coding. There are hills in the chest. Good artists copy, great artists steal. 思考比編碼更加重要 知其所以然 胸中自有丘壑，學習一樣東西應該要對本質有所理解。 任何人都有學習
http://codeforces.com/problemset/problem/1138/B Polycarp is a head of a circus troupe. There are n — an even number — artists in the troupe. It is known whether the i-th artist can perform as a clown (if yes, then ci=1, otherwise ci=0), and whether th
Clear the String 题目链接 Discription You are given a string s of length n consisting of lowercase Latin letters. You may apply some operations to this string: in one operation you can delete some contiguous substring of this string, if all letters in the
