http://poj.org/problem?id=2236 //* @author: 82638882@163.com import java.util.*; public class Main { public static void main(String[] args) { Scanner in=new Scanner(System.in); int a=in.nextInt(); int max=in.nextInt(); max*=max; int[] ax=new int[a+1]; int[] ay=new int[a+1]; int[] arr=new int[a+1]; int[] bool=new int[a+1]; for(int i=1;i<=a;i++) arr[i]=i; for(int i=1;i<=a;i++) { ax[i]=in.nextInt(); ay[i]=in.nextInt(); } while(in.hasNext()) { if(in.next().equals("O")) { int w=in.nextInt(); if(bool[w]==1) continue; for(int j=1;j<=a;j++) { if(bool[j]==0) continue; int u=j; while(arr[u]!=u) u=arr[u]; int l=w; while(arr[l]!=l) l=arr[l]; if(l==u) continue; int x=ax[w]-ax[j]; int y=ay[w]-ay[j]; if(x*x+y*y<=max) { if(u>l) arr[j]=arr[w]=arr[u]=l; else arr[j]=arr[w]=arr[l]=u; } } bool[w]=1; } else { int r=in.nextInt(),w=r; while(arr[w]!=w) w=arr[w]; int t=in.nextInt(),u=t; while(arr[u]!=u) u=arr[u]; arr[r]=w; arr[t]=u; if(arr[w]==arr[u]&&bool[w]==1) System.out.println("SUCCESS"); else System.out.println("FAIL"); } } } }
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