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前言 本文需要的前置知识： OOP Kotlin语法 特别简单的人类自然语言语法知识 我们都知道，OOP的经典范式是每个方法或者属性都需要有对应的对象。一个很常见的例子就是 someInstance.doSomething(someTarget) ：某个对象执行一个成员函数，参数是另一个对象。 笔者某……

从CPS到Kotlin Coroutine基岩层探秘 前言 Kotlin Coroutine是一个十分优秀的并发语言特性，他几乎透明，开发者友好，在一定程度上甚至保留了Java的互操作性。 Kotlin Coroutine的底层是怎么实现的？我们今天将通过观察反编译后的代码的方式深入学习一下Coroutine调用……

This is a hard version of Ep. 67. If you prefer an easier problem, please see OBCYSIO67. Meeting Point Given a directed graph G of n vertices and m edges. A single vertex S is called the starting point and a single vertex T is called the finish poi……

Solved! Difficulty: D2C Pretty basic exercise problem from FLA This is an easy version of Ep. 68. If you prefer harder problems, please visit here. Meeting Point Given a directed graph G of n vertices and m edges. A single vertex S is called ……

Context 笔者作为交换生报名了新加坡国立大学的日语课程，由于曾经参加过日语训练，需要参加日语Placement Test。参加链接如下：CLS。 作为参考，笔者的阅读水平为N2，听力水平为N3，但是由于参加的是应试课程，没有口语和写作经验。 筆者は交換留学生として、会話と……

Solved! Difficulty: Div2C Classic 思考题 HP You are given a grid of n*m cells. You start from a starting cell S and can move up, down, left or right in one step without leaving the grid. Find: is it possible to visit each cell once and exactl……

Solved Difficulty: D2C 思考题 inspired by Saionji Video Channel Eastmost Eki There are n points on a 2D plane. You can select any real point as pivot in the rectangle bounded by (a,b) and (c,d) and rotate the entire plane by d degree clockwis……

思考题 inspired by car lanes Car Lane In Ryuto the capital of the Dragon Kingdom, there is an intersection with k+1 exits. On one lane of one exit, there is a queue of n cars. The i-th car in the queue wants to go in the direction d_i (1\leq d_i\le……

Solved Difficulty: D2C-D2D 思考题 inspired by Create Mod Assembly Line There is an assembly line consisting of n machines. The i-th machine on the line holds an infinitely long input queue and a processing time of t_i seconds. The machines wo……