记录编号	117356	评测结果	AAAAAAAAAA
题目名称	[USACO Open09] 捉迷藏	最终得分	100
用户昵称	HouJikan	是否通过	通过
代码语言	C++	运行时间	0.054 s
提交时间	2014-08-29 15:49:37	内存使用	0.62 MiB

#include <iostream>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <algorithm>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <list>
#include <vector>
#include <ctime>
#include <iterator>
#include <functional>
#define pritnf printf
#define scafn scanf
#define For(i,j,k) for(int i=(j);i<=(k);(i)++)
using namespace std;
typedef long long LL;
typedef unsigned int Uint; 
const int INF=0x7ffffff;
//==============struct declaration==============

//==============var declaration=================
int n,r;
vector <int> Edge[20010];
int dist[20010];
//==============function declaration============

//==============main code=======================
int main()
{  
  string FileName="hideseek";//程序名 
  string FloderName="COGS";//文件夹名 
  freopen((FileName+".in").c_str(),"r",stdin);
  freopen((FileName+".out").c_str(),"w",stdout);
#ifdef DEBUG  
  system(("cp C:\\Users\\Administrator\\Desktop\\"+FloderName+"\\standard.cpp C:\\Users\\Administrator\\Desktop\\"+FloderName+"\\submit.txt").c_str());
  clock_t Start_Time=clock();
#endif    
   scanf("%d%d",&n,&r);
   For(i,1,n)
     Edge[i].clear();
   int s,e;
   For(i,1,r)
   {
     scanf("%d%d",&s,&e);
     Edge[s].push_back(e);
     Edge[e].push_back(s);
   }
   memset(dist,-1,sizeof(dist));
   dist[1]=0;
   queue <int>Q;
   Q.push(1);
   while (!Q.empty())
   {
     int now=Q.front();Q.pop();
     int siz=Edge[now].size()-1;
     int x;
     For(i,0,siz)
     {
       x=Edge[now][i];
       if (dist[x]!=-1) continue;
       dist[x]=dist[now]+1;
       Q.push(x);
     }
   }
   int mindis=0,minn,cnt=0;
   For(i,2,n)
   {
     if (dist[i]>mindis)
       mindis=dist[i],cnt=0,minn=i;
     if (dist[i]==mindis)  
       cnt++; 
   }
   printf("%d %d %d\n",minn,mindis,cnt);
#ifdef DEBUG  
  clock_t End_Time=clock();
  printf("\n\nTime Used: %.4lfms\n",End_Time-Start_Time);
#endif    
  return 0;
}
//================fuction code====================