Yet Another Ball Problem time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output The king of Berland organizes a ball! nn pair are invited to the ball, they are numbered from 11 to nn . Each pair…

大意: 求构造n个pair, 每个pair满足 对于每k组, 让$b_i$为$[1,k]$, $g_i$循环右移就好了 int n, k, cnt; int main() { scanf("%d%d", &n, &k); if (n>(ll)k*(k-1)) return puts("NO"),0; puts("YES"); int cnt = 0; REP(i,1,n) { int cur = i+1; REP(j,1,k…

Dragon Ball Problem Description   Sean has got a Treasure map which shows when and where the dragon balls will appear. some dragon balls will appear in a line at the same time for each period.Since the time you got one of them,the other dragon ball w…

英文链接:http://scikit-learn.org/stable/auto_examples/applications/topics_extraction_with_nmf_lda.html 这是一个使用NMF和LDA对一个语料集进行话题抽取的例子. 输入分别是是tf-idf矩阵(NMF)和tf矩阵(LDA). 输出是一系列的话题,每个话题由一系列的词组成. 默认的参数(n_samples/n_features/n_topics)会使这个例子运行数十秒. 你可以尝试修改问题的规模,但是要注…

本文转自:http://www.cnblogs.com/salam/archive/2010/10/29/1864246.html 现在学习Windows Phone 7开发资料十分有限,除了MSDN的官方开发文档外和一些博客外,几无其他的学习渠道.幸运地是美国的资深程序员兼作家Charles Petzold为大家免费放出了他的最新大作—<Programming windows phone 7 series>.他以往写的书籍本本是经典,包括我们耳熟能详的<Windows 程序设计>…

A. Water Buying 链接:http://codeforces.com/contest/1118/problem/A 实现代码: #include<bits/stdc++.h> using namespace std; #define ll long long int main() { ll n,a,b,m; cin>>n; ;i <= n;i ++){ cin>>m>>a>>b; <= b) cout<<m*a…

https://developer.valvesoftware.com/wiki/Latency_Compensating_Methods_in_Client/Server_In-game_Protocol_Design_and_Optimization Overview Designing first-person action games for Internet play is a challenging process. Having robust on-line gameplay in…

Dragon Ball Problem Description Five hundred years later, the number of dragon balls will increase unexpectedly, so it's too difficult for Monkey King(WuKong) to gather all of the dragon balls together. His country has N cities and there are exactly…

补题地址:https://zjusummer.contest.codeforces.com/ Contents ZJU-ICPC Summer 2020 Contest 1 by Group A Problem A. MUG Problem B. Count Angles Problem F. Balloons Tower Defence ZJU-ICPC Summer 2020 Contest 2 by Group B Problem A. The Number of Good Interva…

Solution 这是一道好题. 考虑球体的体积是怎么计算的: 我们令\(f_k(r)\)表示\(x\)维单位球的体积, 则 \[ f_k(1) = \int_{-1}^1 f_{k - 1}(\sqrt{1 - r^2}) dr \] 然而\(f_{k - 1}(\sqrt{1 - x^2})\)并不容易处理, 我们又注意到\(k\)维球体的体积可以表示为\(a \pi r^k\), 因此\(f_k(\sqrt{1 - r^2}) = f_k(1) \times (1 - r)^{\frac…