在nutch中,默认情况下尊重robot.txt的配置,同时不提供配置项以忽略robot.txt. 以下是其中一个解释.即作为apache的一个开源项目,必须遵循某些规定,同时由于开放了源代码,可以简单的通过修改源代码来忽略robot.txt的限制. From the point of view of research and crawling certain pieces of the web, and i strongly agree with you that it should be c…
#include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <vector> using namespace std; struct node { int f, s; }; vector<node>imap[40005]; int deep[40005]; int dis[40005]; int fa[40005]; int ff…
#include <iostream> #include<cstring> #include<cstdio> #include<cmath> #include<climits> using namespace std; int g[505][505]; int dx[505],dy[505]; bool vx[505], vy[505]; int dis[505]; int n, x, y; int res, minn; bool find(in…
use sentinel to avoid boudary testing, use swap trick to avoid extra copy. original version #include <cstdio> #include <algorithm> int main() { //freopen("input.txt","r",stdin); const int MAXSIZE=22, dimSize=20; int bacnums…
for the backtracking part, thanks to the video of stanford cs106b lecture 10 by Julie Zelenski for the nice explanation of recursion and backtracking, highly recommended. in hdu 2553 cout N-Queens solutions problem, dfs is used. // please ignore, bel…
errors, clauses in place, logical ones, should be avoided. #include <cstdio> #include <cstring> #include <algorithm> int main() { //freopen("input.txt","r",stdin); const int CorNum=201; int ncase, npair, to,from, firs…
PIGS Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 18209 Accepted: 8277 Description Mirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doesn't have the keys. Customers come to th…
Network Saboteur Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 10147 Accepted: 4849 Description A university network is composed of N computers. System administrators gathered information on the traffic between nodes, and carefully divid…
Pots Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 11885 Accepted: 5025 Special Judge Description You are given two pots, having the volume of A and B liters respectively. The following operations can be performed: FILL(i) fill the pot i…
Prime Path Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 14091 Accepted: 7959 Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit r…
Find The Multiple Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 21851 Accepted: 8984 Special Judge Description Given a positive integer n, write a program to find out a nonzero multiple m of n whose decimal representation contains only t…
Dungeon Master Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 20995 Accepted: 8150 Description You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be filled wit…
Curling 2.0 Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 14289 Accepted: 5962 Description On Planet MM-21, after their Olympic games this year, curling is getting popular. But the rules are somewhat different from ours. The game is play…
Removing Columns time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remo…
