POJ_2236(并查集)
来源:互联网 发布:咫尺网络官网 编辑:程序博客网 时间:2024/05/02 14:05
题目:
Description
An earthquake takes place in Southeast Asia. The ACM (Asia Cooperated Medical team) have set up a wireless network with the lap computers, but an unexpected aftershock attacked, all computers in the network were all broken. The computers are repaired one by one, and the network gradually began to work again. Because of the hardware restricts, each computer can only directly communicate with the computers that are not farther than d meters from it. But every computer can be regarded as the intermediary of the communication between two other computers, that is to say computer A and computer B can communicate if computer A and computer B can communicate directly or there is a computer C that can communicate with both A and B.
In the process of repairing the network, workers can take two kinds of operations at every moment, repairing a computer, or testing if two computers can communicate. Your job is to answer all the testing operations.
In the process of repairing the network, workers can take two kinds of operations at every moment, repairing a computer, or testing if two computers can communicate. Your job is to answer all the testing operations.
Input
The first line contains two integers N and d (1 <= N <= 1001, 0 <= d <= 20000). Here N is the number of computers, which are numbered from 1 to N, and D is the maximum distance two computers can communicate directly. In the next N lines, each contains two integers xi, yi (0 <= xi, yi <= 10000), which is the coordinate of N computers. From the (N+1)-th line to the end of input, there are operations, which are carried out one by one. Each line contains an operation in one of following two formats:
1. "O p" (1 <= p <= N), which means repairing computer p.
2. "S p q" (1 <= p, q <= N), which means testing whether computer p and q can communicate.
The input will not exceed 300000 lines.
1. "O p" (1 <= p <= N), which means repairing computer p.
2. "S p q" (1 <= p, q <= N), which means testing whether computer p and q can communicate.
The input will not exceed 300000 lines.
Output
For each Testing operation, print "SUCCESS" if the two computers can communicate, or "FAIL" if not.
Sample Input
4 10 10 20 30 4O 1O 2O 4S 1 4O 3S 1 4
Sample Output
FAILSUCCESS下面是我的AC代码:
#include"stdio.h"
#include "math.h"
const int MAX_SIZE = 1002;
class UFS
{
public:
int ancestor[MAX_SIZE];
int degree[MAX_SIZE];
bool repaired[MAX_SIZE];
int xi[MAX_SIZE];
int yi[MAX_SIZE];
void MakeSet();
int FindSet(const int& x);
void Union(const int& x,const int& y);
};
void UFS::MakeSet()
{
for(int i = 0;i<MAX_SIZE;++i)
{
this->ancestor[i] = i;
this->degree[i] = 0;
this->repaired[i] = false;
this->xi[i] = 0;
this->yi[i] = 0;
}
}
int UFS::FindSet(const int& x)
{
if(ancestor[x] != x)
{
ancestor[x] = FindSet(ancestor[x]);
}
return ancestor[x];
}
void UFS::Union(const int& x,const int& y)
{
int xAncestor = this->FindSet(x);
int yAncestor = this->FindSet(y);
if(xAncestor == yAncestor)
{
return ;
}
if(degree[xAncestor] < degree[yAncestor])
{
ancestor[xAncestor] = yAncestor;
}
else
{
if(degree[xAncestor] == degree[yAncestor])
{
degree[xAncestor] += 1;
}
ancestor[yAncestor] = xAncestor;
}
}
int N,d;
int main(void)
{
UFS ufs;
ufs.MakeSet();
scanf("%d %d",&N,&d);
for(int i = 1;i<=N;++i)
{
scanf("%d %d",&ufs.xi[i],&ufs.yi[i]);
}
char c;
int c1,c2;
while(scanf("%c",&c)!=EOF)
{
if(c == 'O')
{
scanf(" %d",&c1);
ufs.repaired[c1] = true;
for(int j = 1;j<=N;j++)
{
if(ufs.repaired[j] == true)
{
if(pow(ufs.xi[c1]-ufs.xi[j],2) + pow(ufs.yi[c1]-ufs.yi[j],2)<= d*d)
{
ufs.Union(c1,j);
}
}
}
}
if(c == 'S')
{
scanf(" %d %d",&c1,&c2);
if(ufs.FindSet(c1) == ufs.FindSet(c2))
{
printf("SUCCESS/n");
}
else
{
printf("FAIL/n");
}
}
}
return 0;
}
- POJ_2236(并查集)
- 并查集(集并查)
- 并查集(含关系并查集)
- 【并查集】食物链(关系并查集)
- 【并查集】并查集详解(转)
- 分组并查集(种类并查集)
- 并查集, 畅通工程(简单并查集)
- [数据结构]并查集水体POJ2236(并查集)
- 并查集(disjoint_set)
- 并查集(模板)
- 并查集(亲戚)
- POJ2524(并查集)
- poj2492(并查集)
- HDU1272(并查集)
- 随笔(并查集)
- POJ1988(并查集)
- hdoj1272(并查集)
- 家族(并查集)
- 八个最常用的正则表达式
- 大洋蛋...好想你...倒数355...
- TM2009-微博-关掉它
- Windows Phone 7 Developer Tools 更新指南
- 互联网产品的灰度发布
- POJ_2236(并查集)
- [转]JSP中与路径相关的常用的几个方法
- Swing之JTree——1
- Swing之JTree——2
- Swing之JTree——3
- JVM学习笔记(一)------基本结构
- php的二叉树的表示
- Excel2003编辑CSV文件,乱码
- poj 3126 简单bfs