XGN 的文章
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YZHT Ep.2: 少见的三分
题目：给出一个圆和两点，求这两点间最短路线的距离，要求路线经过圆内部或边上的任意一点。 链接：104871G 如果两个点有一个在圆内（上）就好了…… 如果两个都在圆外，设经过的圆上一点有仰角\alpha，那么注意到答案关于\alpha一定只有一个极小值。就可以三分了！ 难……XGN 2024年5月17日
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YZHT Ep.1: 最大流+图论优质好题
欢迎来到YZHT系列，这个系列我将分享我遇到的OI好题。 第一题 笔者最近正在学习数学图论，但是在OI中正巧碰到了这样一道从来没见过的最大流题。虽然难度不大，但是思路比较新： Problem B of 2023-2024 ICPC Southwestern European Regional Contest (SWERC 2023) 顺…… -
2024春南京大学大学物理期中试题速报 (Prof. Yachong Guo)
概括 原文为英文，本文是回忆版。考完收试卷、草稿纸。可以携带一张A4手写笔记。g=9.8m/s^2 ▲The Dog of Yachong Guo P1 有一个半径R质量均匀的实心球在表面产生了a_g的引力加速度。求：球内和球外加速度分别为\frac{a_g}{3}的位置。 P2 一个小球拴在L=1.25m的轻质绳…… -
Orange Boy Can You Solve It Out? Ep. 60
Solved! Difficulty: Div2C :O 竟然有60期了！！ 本期题目来源于Group Theory作业，，，难度不高 Congratulations on the 60th entry!! This problem is from my Group Theory homework (not very hard). Z(Sym(n))=ONE In the world of MATHS, a permutation i…… -
Introducing a gender-safe and tense-safe programming language
Note: This is a April Fools' Joke Introduction Nowadays, as most programming languages are built on top of English grammar and syntax, it is sometimes difficult for Latin, Spanish or French speakers to get used to the syntax in programming. Insprie…… -
Shanghai in Caligine（XGN&ZKY）
概述 本文为2024年2月XGN（笔者）与ZKY前往上海City Walk的游记。 题目~为了体现上海的洋文氛围~使用了拉丁语。 缘由 春节期间，国铁部门为了更快的响应旅客春节期间过年回家的需求，加开了许多临时列车。而其中又有这样的几辆车，考虑到人民收入水平不均，价格十分的…… -
浅谈Minecraft服务器的常用替代和多人联机的种种方案
水水文章。 笔者和HDD 292在寒假时一起游玩了 Create Arcane Engineering 整合包。由于笔者手头拮据，并无多余的资金购置服务器，于是探索了几种常见的服务器平替和端口映射方法，现比较： Essential Essential是国外大佬团队开发的游戏内社交平台mod，支持好友、聊…… -
Orange Boy Can't You Solve It Out? Ep. 59
思考题 aimed for inexperienced participants? Silenced! Ookami and her teammates are taking an English class. The team has n people(animals?) in total. Initially, each person can raise his/her hand and speak freely. However, once a student has raise…… -
Orange Boy Can You Solve It Out? Ep. 58
Solved! Difficulty: Div2 C 思考题 in mid autumn LianLi Branches Wulpit has drawn n nodes(indexed from 1 to n) and n-m edges on paper for homework assignments. They form m rooted trees (aka a forest). However, when she went to the toilet, Fely…… -
Green Boy Can't You Solve It Out? Ep. 2
Solved! Difficulty: Div2B 1 problem for div3 participants. Beautiful Dice Painting When Epis is bored, she will draw dices. The canvas contains n*n dots. Initially they are all white. You need to paint exactly v dots black so that the final c……