感覺這倒題沒有出好，比如數據：

3

1 2 30

1 3 30

2 1 30

2 3 30

3 1 30

3 2 30

?

公司1到底控制了2、3沒有？可以說控制了，也可以說沒有，但題目意思是沒有控制。

?

看了nocow上的解答才發現原來就是一個簡單的模擬題，大家去nocow看吧：

NOCOW上關于Controlling Companies的解答

我的代碼是參考usaco答案的

?

?

Code
/**//*
ID:?sdjllyh1
PROG:?concom
LANG:?JAVA
complete?date:?2008/12/20
author:?LiuYongHui?From?GuiZhou?University?Of?China
more?article:?www.cnblogs.com/sdjls
*/

import?java.io.*;
import?java.util.*;

public?class?concom
{
????private?static?int?n?=?100;
????private?static?int[][]?owns?=?new?int[n][n];
????private?static?boolean[][]?controls?=?new?boolean[n][n];
????private?static?int?triples;
????private?static?int[]?triplesI;
????private?static?int[]?triplesJ;
????private?static?int[]?triplesP;

????public?static?void?main(String[]?args)?throws?IOException
????{
????????init();
????????run();
????????output();
????????System.exit(0);
????}

????private?static?void?run()
????{
????????for?(int?i?=?0;?i?<?n;?i++)
????????{
????????????controls[i][i]?=?true;
????????}

????????for?(int?counter?=?0;?counter?<?triples;?counter++)
????????{
????????????int?i?=?triplesI[counter];
????????????int?j?=?triplesJ[counter];
????????????int?p?=?triplesP[counter];

????????????for?(int?k?=?0;?k?<?n;?k++)
????????????????if?(controls[k][i])
????????????????????owns[k][j]?+=?p;

????????????for?(int?k?=?0;?k?<?n;?k++)
????????????????if?(owns[k][j]?>?50)
????????????????????addcontroller(k,?j);
????????}
????}

????private?static?void?addcontroller(int?i,?int?j)
????{
????????if?(controls[i][j])
????????{
????????????return;
????????}

????????controls[i][j]?=?true;

????????for?(int?k?=?0;?k?<?n;?k++)
????????{
????????????owns[i][k]?+=?owns[j][k];
????????}

????????for?(int?k?=?0;?k?<?n;?k++)
????????{
????????????if?(controls[k][i])
????????????{
????????????????addcontroller(k,?j);
????????????}
????????}

????????for?(int?k?=?0;?k?<?n;?k++)
????????{
????????????if?(owns[i][k]?>?50)
????????????{
????????????????addcontroller(i,?k);
????????????}
????????}
????}

????private?static?void?init()?throws?IOException
????{
????????BufferedReader?f?=?new?BufferedReader(new?FileReader("concom.in"));
????????triples?=?Integer.parseInt(f.readLine());

????????triplesI?=?new?int[triples];
????????triplesJ?=?new?int[triples];
????????triplesP?=?new?int[triples];
????????for?(int?k?=?0;?k?<?triples;?k++)
????????{
????????????StringTokenizer?st?=?new?StringTokenizer(f.readLine());
????????????triplesI[k]?=?Integer.parseInt(st.nextToken())?-?1;
????????????triplesJ[k]?=?Integer.parseInt(st.nextToken())?-?1;
????????????triplesP[k]?=?Integer.parseInt(st.nextToken());
????????}
????????f.close();
????}

????private?static?void?output()?throws?IOException
????{
????????PrintWriter?out?=?new?PrintWriter(new?BufferedWriter(new?FileWriter("concom.out")));
????????for?(int?i?=?0;?i?<?n;?i++)
????????{
????????????for?(int?j?=?0;?j?<?n;?j++)
????????????{
????????????????if?((i?!=?j)?&&?(controls[i][j]))
????????????????{
????????????????????out.println((i?+?1)?+?"?"?+?(j?+?1));
????????????????}
????????????}
????????}
????????out.close();
????}
}

轉載于:https://www.cnblogs.com/SDJL/archive/2008/12/20/1358920.html

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