比以往更加黑暗的思考题 广西省人大音乐 不支持audio！！ Idolatrize World Haniyasushin Keiki loves crafting. She has n kinds of items. The i-th kind of item has name name_i. She also has m recipes. The i-th recipe needs len_i of different kinds of dif……

思考题 for grand contest Orange Boy(Monk.eyk.ing),Red girl(Mack.erel.pike) and their cat LGM(Legendary.Grand.Meow) are a happy family. But in fact, they are the heroes that is helping the world in silent. One day, the earth is under the attack……

思考题 about poems Is your love as confusing as the sun acquiesced? Once a Chinese poem said: There's sun in the east but rain in the west, Is your love as confusing as the sun acquiesced? Now you are given a undirected weighted graph G of N ……

思考题 for Hakurei Reimu Legacy of Lunatic Kingdom ZJS loves playing Touhou. In the famous STG game Touhou:Legacy of Lunatic Kingdom the game rules are defined as follows: The game consists of N "stages". Player start from Stage 1 and ends at Stage……

OGF - Cayley Formula Question Statement Prove # of trees on [n] = n^{n-2} Solution f:(1,2,3,...,n)\to(1,2,3,...,n) f(1)=1,f(n)=n Functional Digraph(directed graph) D V(D)=[n] 编者注：V为节点集合 (i,j)\in E(D) if f(i)=j 注：E为边集合 Example | ……

$\mathcal A$ is a collection of combinatorial objects. => $\mathcal A$ and $\mathcal B$ are combinatorically isomorphic if there exist a size-preserving bijection between $\mathcal A$ and $\mathcal B$ Q1 Prove that number of Dyck Paths D_{n-1} equa……

思考题 of math again Slime Legend II In the world of fantasy, there lives N+1 types of monsters indexed from 0 to N. Each monster can be represented by an integer pow_i - their power. And specially, type 0 is SLIME. Slime has a special ability to "……

欢迎来到Hell Hole Studios Blog! 这是一个由HHS成员共同维护的blog网站，主要内容包括游戏、技术、数学、信息竞赛和旅游日记，主要blog语言有中文、英文（备注：点击标签来查看同标签内容）。下面的链接可能会帮助到您更好的浏览本站。 Welcome to the Hell Hole Stu……

Today is the first day of MUTC!!! On this site there will be diary about our team (team0248). Good luck! MUTC is a series of OI contests held every year usually 10 contests in a row.

In a recent Codeforces Contest Codeforces Global Round 4, the Orange Boy MonkeyKing got a T-shirt by getting rank 449. BEST RATING CHANGE