原题链接在这里:https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/ 题目: Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of nodes), write a function to find the number of connected com…

R  画网络图 目的:用R做生信分析,画基因样本的网络图,从中观察样本的致病性情况. 一.所用到的包 library(tidyr) library(ggplot2) library(reshape2) library(readr) library(network) library(dplyr) library(plyr) library(sna) library(GGally) library(ggnetwork) library(tidygraph)# tidy graph analysis…

原题链接在这里:https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/ 题目: Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of nodes), write a function to find the number of connected com…

先上几个资料: 百度文库有详细的分析和证明 cxlove的博客 TopCoder Algorithm Tutorials #include <cstdio> #include <cstring> #include <algorithm> #include <vector> #include <cmath> using namespace std; + ; const int INF = 0x3f3f3f3f; int n, m, k; struc…

The information in this topic is useful if you're trying to programmatically find a built-in command, menu, or toolbar. The ICommandBars.Find and ICommandBar.Find methods can be used to get a reference to a specific toolbar, menu, or command. Both of…

Open Cascade:如何从AIS_Shape导出TopoDS_Shape? 实现代码如下: if( !myAISContext->HasOpenedContext()) { wxMessageBox(_T("It is necessary to activate the edges selection mode\n\and select edges on an object before \nrunning this function"),_T("Error!&q…

地址:https://atcoder.jp/contests/agc033/ D Complexity dp[ i ][ j ][ k ][ l ] 表示左上角是 ( i , j ) .右下角是 ( k , l ) 的矩阵的最小代价. 注意到答案是 log(n) + log(m) 级别的,因为每次从中间分, log 次之后就变成一行/列,log(n)+log(m)次就变成 1*1 的格子,代价是 0 . 所以把值和角标互换,dp[ i ][ j1 ][ j2 ][ k ] 表示左上角是 ( i…

-- 首先,以超级管理员的身份登录oracle sqlplus sys/bjsxt as sysdba --然后,解除对scott用户的锁 alter user scott account unlock; --那么这个用户名就能使用了. --(默认全局数据库名orcl) 1.select ename, sal * 12 from emp; --计算年薪 2.select 2*3 from dual; --计算一个比较纯的数据用dual表 3.select sysdate from dual; -…

In [1]: from matplotlib import pyplot as plt import numpy as np import matplotlib as mpl mpl.rcParams['font.sans-serif'] = ['SimHei'] # 中文字体支持   1 饼图-pie()¶   1.1 pie()方法参数说明¶   pie()是matplotlib中画饼图的方法,其主要参数如下:  …

2021.07.17 题解 CF1385E Directing Edges(拓扑排序) CF1385E Directing Edges - 洛谷 | 计算机科学教育新生态 (luogu.com.cn) 题意: 给定一个由有向边与无向边组成的图,现在需要你把所有的无向边变成有向边,使得形成的图中没有环. 如果可以做到请输出该图,否则直接输出"NO". 注意多组询问. 分析: 对于一个有向无环图,一条边,拓扑序小的一端指向拓扑序大的一端,因此确定无向边的方向. 代码如下: #include…