F.A.Q
Hand In Hand
Online Acmers
Problem Archive
Realtime Judge Status
Authors Ranklist
 
     C/C++/Java Exams     
ACM Steps
Go to Job
Contest LiveCast
ICPC@China
 Best Coder beta
VIP | STD Contests
    DIY | Web-DIY beta
Author ID 
Password 
 Register new ID

Party

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 17235    Accepted Submission(s): 4579


Problem Description
��n�Է��ޱ�����μ�һ���ۻᣬ��Ϊ���ص����⣬ÿ�Է�����ֻ��1�˿�����ϯ����2n �����У�ijЩ��֮�����źܴ��ì�ܣ���Ȼ����֮����û��ì�ܵģ�����ì�ܵ�2�����Dz���ͬʱ�����ھۻ��ϵġ���û�п��ܻ���n ����ͬʱ��ϯ��
 

Input
n�� ��ʾ��n�Է��ޱ����� (n<= 1000)
m�� ��ʾ��m ��ì�ܹ�ϵ ( m < (n - 1) * (n -1))

�ڽ�������m���У�ÿ�л���4�����֣��ֱ��� A1,A2,C1,C2
A1,A2�ֱ��ʾ�Ƿ��޵ı��
C1,C2 ��ʾ�����ӻ����ɷ� ��0��ʾ���� ��1���ɷ�
���ޱ�Ŵ� 0 �� n -1
 

Output
�������һ����� �����YES
������� NO
 

Sample Input
2 
1
0 1 1 1
 

Sample Output
YES
 

Source
2009 Multi-University Training Contest 16 - Host by NIT
 

Statistic | Submit | Discuss | Note
Home | Top Hangzhou Dianzi University Online Judge 3.0
Copyright © 2005-2025 HDU ACM Team. All Rights Reserved.
Designer & Developer : Wang Rongtao LinLe GaoJie GanLu
Total 0.001000(s) query 1, Server time : 2025-08-05 14:13:57, Gzip enabled 		Administration