网易2016实习题-比较重量
题目描述：
小明陪小红去看钻石，他们从一堆钻石中随机抽取两颗并比较她们的重量。这些钻石的重量各不相同。
在他们们比较了一段时间后，它们看中了两颗钻石g1和g2。
现在请你根据之前比较的信息判断这两颗钻石的哪颗更重。
给定两颗钻石的编号g1,g2，编号从1开始，同时给定关系数组vector,其中元素为一些二元组，
第一个元素为一次比较中较重的钻石的编号，第二个元素为较轻的钻石的编号。最后给定之前的比较次数n。
请返回这两颗钻石的关系，若g1更重返回1，g2更重返回-1，无法判断返回0。输入数据保证合法，不会有矛盾情况出现。
测试用例：
2,3,[[1,2],[2,4],[1,3],[4,3]],4解题思路：
该提应当也用广度搜索算法，判断根据已有的边情况，是否存在从指定点A到指定点B的路径，如果存在，则表示A>B;因为该题的边应当被视为有向
边，因此给定A,B，需要做两次搜索，A---->B,B----->A;
源码
import java.util.*;
public class Cmp {
public static void main(String[] args){
//测试用例
String str="[[2,2],[10,8],[7,9],[8,2],[7,6],[2,18],[11,2],[7,4],[14,6],[13,13],[2,4],[14,5],[11,6],[6,5],[7,11],[14,16],[7,13],[2,5],[12,4],[12,1],[1,9],[3,6],[12,14],[12,7],[6,1],[10,8],[5,9],[3,6],[2,4],[15,2],[3,5],[11,6],[12,1],[2,4],[8,18],[15,9],[3,6],[10,3],[13,3],[12,9],[12,10],[7,10],[10,3],[4,5],[10,5],[3,18],[10,3],[2,16],[7,1],[11,18],[12,16],[7,9],[15,15],[16,9],[15,9],[13,18],[7,5],[3,5],[13,18],[13,15],[11,13],[1,9],[12,15],[2,6],[11,6],[11,14],[17,5],[13,6],[7,18],[4,5],[8,2],[8,4],[10,8],[16,4],[13,6],[16,17],[11,2],[13,14],[12,3],[7,14],[11,5],[18,5],[10,14],[7,11],[12,3],[16,4],[8,16],[12,9],[16,1],[12,4],[1,9],[3,6],[11,6],[3,5],[16,18],[8,2],[12,2],[11,8],[8,2],[12,3],[14,9],[8,2],[4,5],[12,17],[3,9],[8,4],[6,17],[8,5],[13,17],[6,9],[2,16],[2,5],[11,18],[12,17],[13,5],[12,5],[6,4],[13,8],[11,3],[3,4],[16,16],[8,2],[6,9],[13,17],[15,1],[1,17],[11,10],[10,5],[11,10],[12,1],[11,3],[8,4],[10,15],[12,13],[6,6],[18,17],[2,16],[7,5],[10,8],[11,17],[15,6],[3,18],[8,18],[16,17],[10,17],[13,13],[16,4],[13,16],[8,18],[15,3],[10,18],[11,13],[1,9],[12,4],[1,5],[8,17],[17,17],[12,2],[13,4],[15,1],[2,9],[4,5],[12,13],[11,2],[13,18],[10,1],[6,18],[12,17],[4,9],[12,14],[7,15],[2,16],[4,9],[12,1],[17,5],[10,16],[16,4],[17,9],[13,8],[8,3],[12,3],[8,4],[2,5],[7,11],[13,5],[8,4],[14,5],[16,9],[1,1],[14,17],[15,16],[2,4],[4,9],[18,4],[12,15],[1,5],[16,6],[3,14],[2,5],[4,9],[8,9],[13,8],[13,13],[13,16],[10,16],[8,5],[11,17],[10,5],[6,4],[8,6],[12,17],[1,17],[10,6],[13,9],[14,6],[2,17],[13,2],[11,10],[16,5],[7,9],[6,17],[3,16],[6,9],[8,5],[2,9],[10,16],[2,5],[13,6],[8,8],[13,10],[8,2],[10,14],[10,5],[15,14],[13,16],[11,17],[7,9],[7,4],[10,18],[2,5],[14,1],[7,5],[12,6],[4,5],[8,3],[13,16],[15,5],[3,9],[11,4],[16,4],[12,9],[8,6],[12,5],[6,18],[3,9],[15,5],[17,5],[3,6],[3,16],[8,1],[7,10],[8,18],[15,14],[17,9],[6,17],[16,1],[6,1],[11,15],[6,17],[10,5],[15,18],[10,16],[13,10],[10,4],[8,6],[8,1],[12,6],[17,9],[8,9],[14,5],[11,8],[15,14],[7,5],[18,4],[7,6],[3,16],[11,18],[12,10],[7,10],[16,5],[12,10],[8,18],[18,1],[16,1],[15,9],[12,18],[8,9],[7,1],[6,9],[2,16],[10,14],[10,1],[8,4],[11,5],[11,5],[16,5],[12,7],[8,3],[15,18],[8,5]]";
str=str.replaceAll("\\[","{" );
str=str.replaceAll("\\]","}" );
System.out.println(str);
int[][] nums={{2,2},{10,8},{7,9},{8,2},{7,6},{2,18},{11,2},{7,4},{14,6},{13,13},{2,4},{14,5},{11,6},{6,5},{7,11},{14,16},{7,13},{2,5},{12,4},{12,1},{1,9},{3,6},{12,14},{12,7},{6,1},{10,8},{5,9},{3,6},{2,4},{15,2},{3,5},{11,6},{12,1},{2,4},{8,18},{15,9},{3,6},{10,3},{13,3},{12,9},{12,10},{7,10},{10,3},{4,5},{10,5},{3,18},{10,3},{2,16},{7,1},{11,18},{12,16},{7,9},{15,15},{16,9},{15,9},{13,18},{7,5},{3,5},{13,18},{13,15},{11,13},{1,9},{12,15},{2,6},{11,6},{11,14},{17,5},{13,6},{7,18},{4,5},{8,2},{8,4},{10,8},{16,4},{13,6},{16,17},{11,2},{13,14},{12,3},{7,14},{11,5},{18,5},{10,14},{7,11},{12,3},{16,4},{8,16},{12,9},{16,1},{12,4},{1,9},{3,6},{11,6},{3,5},{16,18},{8,2},{12,2},{11,8},{8,2},{12,3},{14,9},{8,2},{4,5},{12,17},{3,9},{8,4},{6,17},{8,5},{13,17},{6,9},{2,16},{2,5},{11,18},{12,17},{13,5},{12,5},{6,4},{13,8},{11,3},{3,4},{16,16},{8,2},{6,9},{13,17},{15,1},{1,17},{11,10},{10,5},{11,10},{12,1},{11,3},{8,4},{10,15},{12,13},{6,6},{18,17},{2,16},{7,5},{10,8},{11,17},{15,6},{3,18},{8,18},{16,17},{10,17},{13,13},{16,4},{13,16},{8,18},{15,3},{10,18},{11,13},{1,9},{12,4},{1,5},{8,17},{17,17},{12,2},{13,4},{15,1},{2,9},{4,5},{12,13},{11,2},{13,18},{10,1},{6,18},{12,17},{4,9},{12,14},{7,15},{2,16},{4,9},{12,1},{17,5},{10,16},{16,4},{17,9},{13,8},{8,3},{12,3},{8,4},{2,5},{7,11},{13,5},{8,4},{14,5},{16,9},{1,1},{14,17},{15,16},{2,4},{4,9},{18,4},{12,15},{1,5},{16,6},{3,14},{2,5},{4,9},{8,9},{13,8},{13,13},{13,16},{10,16},{8,5},{11,17},{10,5},{6,4},{8,6},{12,17},{1,17},{10,6},{13,9},{14,6},{2,17},{13,2},{11,10},{16,5},{7,9},{6,17},{3,16},{6,9},{8,5},{2,9},{10,16},{2,5},{13,6},{8,8},{13,10},{8,2},{10,14},{10,5},{15,14},{13,16},{11,17},{7,9},{7,4},{10,18},{2,5},{14,1},{7,5},{12,6},{4,5},{8,3},{13,16},{15,5},{3,9},{11,4},{16,4},{12,9},{8,6},{12,5},{6,18},{3,9},{15,5},{17,5},{3,6},{3,16},{8,1},{7,10},{8,18},{15,14},{17,9},{6,17},{16,1},{6,1},{11,15},{6,17},{10,5},{15,18},{10,16},{13,10},{10,4},{8,6},{8,1},{12,6},{17,9},{8,9},{14,5},{11,8},{15,14},{7,5},{18,4},{7,6},{3,16},{11,18},{12,10},{7,10},{16,5},{12,10},{8,18},{18,1},{16,1},{15,9},{12,18},{8,9},{7,1},{6,9},{2,16},{10,14},{10,1},{8,4},{11,5},{11,5},{16,5},{12,7},{8,3},{15,18},{8,5}};
Cmp cmps=new Cmp();
System.out.println(cmps.cmp(7,8, nums, 310));
}
/**
* 给定钻石编号，和钻石之间对应的关系
* @param g1
* @param g2
* @param records
* @param n
* @return
*/
public int cmp(int g1, int g2, int[][] records, int n) {
HashMap> locations=new HashMap();
for(int i=0;i points=new ArrayList();
points.add(Integer.valueOf(records[i][1]));
locations.put(key, points);
}
}
if(judge(g1,g2,locations)){
return 1;
}else {
if(judge(g2,g1,locations)){
return -1;
}
return 0;
}
}
/**
* 采用bfs，判断是否存在从g1到g2的路径
* @param g1
* @param g2
* @param locations
* @return
*/
private boolean judge(int g1,int g2,HashMap> locations){
Queue temp=new LinkedList();
temp.add(Integer.valueOf(g1));
List record= new ArrayList();
while(!temp.isEmpty()){
Integer cur=temp.poll();
record.add(cur);
if(cur==g2){
return true;
}
List order=locations.get(cur);
if(order!=null){
for(Integer num:order){
if(!record.contains(num)){
temp.add(num);
}
}
}
}
return false;
}
}