A clique is a subset of vertices of an undirected graph such that every two distinct vertices in the clique are adjacent. A maximal clique is a clique that cannot be extended by including one more adjacent vertex. (Quoted from https://en.wikipedia.or
1013 Battle Over Cities (25 分) It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any o
Weibo is known as the Chinese version of Twitter. One user on Weibo may have many followers, and may follow many other users as well. Hence a social network is formed with followers relations. When a user makes a post on Weibo, all his/her followers
The "Hamilton cycle problem" is to find a simple cycle that contains every vertex in a graph. Such a cycle is called a "Hamiltonian cycle". In this problem, you are supposed to tell if a given cycle is a Hamiltonian cycle. Input Specif
A vertex cover of a graph is a set of vertices such that each edge of the graph is incident to at least one vertex of the set. Now given a graph with several vertex sets, you are supposed to tell if each of them is a vertex cover or not. Input Specif
One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we say that A and B is related. The weight of a relation is defined to be the total time length of all the phone calls made b
A graph which is connected and acyclic can be considered a tree. The hight of the tree depends on the selected root. Now you are supposed to find the root that results in a highest tree. Such a root is called the deepest root. Input Specification: Ea
It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other highways to keep the rest of
The "travelling salesman problem" asks the following question: "Given a list of cities and the distances between each pair of cities, what is the shortest possible route that visits each city and returns to the origin city?" It is an N
使用python的图形库. 环境:conda+jupyter notebook 代码如下: import numpy as np from PIL import Image from numba import jit MAXITERS = 200 RADIUS = 100 @jit def color(z, i): v = np.log2(i+1-np.log2(np.log2(abs(z))))/5 if v < 1.0: return v**4, v**2.5, v else: v = ma
发表说说之前,必须登录. 模拟QQ登录 >> http://www.cnblogs.com/deeround/p/4386629.html 发表带图说说,自然少不了上传图片,我这使用的PC端上传图片 首先,FileHelper的创建 QQ空间上传图片,使用的flash上传图片,所以我们需要在post的时候,提交的数据进行一个转换. using System; using System.Collections.Generic; using System.Linq; using System.Te