mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
97 lines
2.1 KiB
C++
97 lines
2.1 KiB
C++
#include<stdio.h>
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#include "math.h"
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int e[2001][2];//杈[0],to.[1]next;
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int a[1001][5];//[0],ID,[1]next;2x3y4z
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int c[1001];
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int cnum;
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int max;int m;
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bool sign[1001];
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int n;//圭扮
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int en;//杈圭扮
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void initt();
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void init();
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int DFS(int s);
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int eq(int x);
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int main()
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{
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while(1)
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{
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scanf("%d",&n);
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if(n==0)return 0;
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initt();
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init();
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int min=1000;
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int i;
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for(i=1;i<=n;i++)//n娆DFS
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{
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max=0;
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m=0;
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DFS(i);
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if(max<min)min=max,c[1]=a[i][0],cnum=1;
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else if(max==min)cnum++,c[cnum]=a[i][0];
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else ;
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}
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if(cnum==1)printf("%d",c[1]);
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else
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{
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if(c[1]>c[2])printf("%d %d",c[2],c[1]);
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else printf("%d %d",c[1],c[2]);
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}
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printf("\n");
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}
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}
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int DFS(int s)
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{
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if(sign[s])return 0;
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if((!e[a[s][1]][1])&&sign[e[a[s][1]][0]]){
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if(max<m){max=m; return 0;}
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else return 0;}
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m++;
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sign[s]=true;
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int next=a[s][1];
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while(next)
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{
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DFS(e[next][0]);
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next=e[next][1];
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}
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m--;sign[s]=false;
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return 0;
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}
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void initt()
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{
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int i;
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cnum=0;
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for(i=0;i<=n;i++)
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a[i][1]=0;
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for(i=0;i<=2*n;i++)
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e[i][1]=0;
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}
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void init()
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{
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int k=0;int en=0;
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k++;
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int id;int x;int y;int z;
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scanf("%d%d%d%d",&id,&x,&y,&z);
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a[k][0]=id;a[k][2]=x,a[k][3]=y,a[k][4]=z;
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while(k<n)
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{
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k++;
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scanf("%d%d%d%d",&id,&x,&y,&z);
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a[k][0]=id;a[k][2]=x,a[k][3]=y,a[k][4]=z;
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int ee;ee=eq(k);
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en++;e[en][0]=ee;e[en][1]=a[k][1];a[k][1]=en;
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en++;e[en][0]=k;e[en][1]=a[ee][1];a[ee][1]=en;
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}
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}
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int eq(int x)
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{
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int i;double min=10000;int xx;
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for(i=1;i<x;i++)
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{
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double temp=((a[x][3]-a[i][3])*(a[x][3]-a[i][3])+(a[x][4]-a[i][4])*(a[x][4]-a[i][4])+(a[x][2]-a[i][2])*(a[x][2]-a[i][2]));
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double val=sqrt(temp);
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if(val<min)min=val,xx=i;
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}
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return xx;
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}
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