Poj Solution 1300

http://poj.org/problem?id=1300

//* @author: 82638882@163.com
import java.util.Scanner;
public class Main
{
    
public static void main(String[] args)
{
  Scanner in=new Scanner(System.in);
  while(true)
  {
    String s=in.next();
    if(s.equals("ENDOFINPUT"))break;
    int loc=in.nextInt();
    int n=in.nextInt();
    in.nextLine();
    int[] door=new int[n];
    int doors=0;
    for(int i=0;i< n;i++)
    {
        s=in.nextLine();
        if(s.equals("")) continue;
        String[] ss=s.split(" ");
        for(int j=0;j< ss.length;j++)
        {
            int u=Integer.parseInt(ss[j]);
            door[i]++;
            door[u]++;
            doors++;
        }
    }
    s=in.nextLine();
    int odd=0,even=0;
    for(int i=0;i< n;i++)
    {
        if(door[i]%2==0) even++;
        else odd++;
    }
    if(odd==0&&loc==0) System.out.println("YES "+doors);
    else if(odd==2&&loc!=0&&door[loc]%2==1&&door[0]%2==1)
        System.out.println("YES "+doors);
    else System.out.println("NO");
  }
 }
}