"And check set" Poj2236-wireless Network

"The main topic"

It is known that each computer can only be connected to a computer with a distance of D, but the two computers can be connected by a third computer as a medium. The computer is all damaged now. You can do one of two operations at a time, or fix a computer, or check whether two computers are connected.

Ideas

Obviously it's a collection. Every time a new computer is repaired, it is judged by each computer that was previously repaired, and the distance is merged within D.

1#include <iostream>2#include <cstdio>3#include <cstring>4 using namespacestd;5 Const intmaxn=1001+ -;6 intn,d;7 intX[MAXN],Y[MAXN],REP[MAXN];8 intH[MAXN],PA[MAXN];9 Ten intIndintAintb) One { A     return((X[a]-x[b]) * (X[a]-x[b]) + (Y[a]-y[b]) * (Y[a]-y[b]) <=d*d); - } -  the voidNewset () - { -      for(intI=0; i<n;i++) -     { +h[i]=0; -pa[i]=i; +     } A } at  - intFindintx) - { -     intR=x; -      while(pa[r]!=r) r=Pa[r]; -     intp=x; in      while(pa[p]!=R) -     { to         inttemp=Pa[p]; +pa[p]=R; -p=temp; the     } *     returnR; $ }Panax Notoginseng  - voidUnionset (intFaintFB) the { +     if(h[fa]>=H[FB]) A     { thepa[fb]=FA; +         if(H[FA]==H[FB]) h[fa]++; -     } $     Else $pa[fa]=FB; - } -  the intMain () - {Wuyiscanf"%d%d",&n,&d); the      for(intI=0; i<n;i++) -     { Wuscanf"%d%d",&x[i],&y[i]); -     } About      $     CharC; -     intRepd=0;//òñ¾ðþºãµäµçäôêýá¿ - Newset (); -      A GetChar (); +      while(SCANF ("%c", &c)! =EOF) the     { -         if(c=='S') $         { the             intb; thescanf"%d%d",&a,&b); thea--; theb--; -             if(Find (a) ==find (b)) cout<<"SUCCESS"<<endl;Elsecout<<"FAIL"<<Endl; in         } the          the         Else About         { the             intA; thescanf"%d",&a); thea--; +              for(intI=0; i<repd;i++) -             { the                 if(Ind (A,rep[i]))Bayi                 { the                     intFa=find (a), fb=find (Rep[i]); the Unionset (FA,FB); -                 } -             } therep[repd]=A; therepd++; the         } the GetChar (); -     } the     return 0; the}

"And check set" Poj2236-wireless Network