#1846. [HDOJ]2471 History of Languages

			
2

3

1 -1 1

0 -1 2

0 -1 0

2

1 -1 1

0 -1 0



3

4

1 -1 -1 1

1 -1 -1 2

1 -1 -1 3

1 -1 -1 1

2

1 -1 -1 1

1 -1 -1 0



0

			
Case #1: No

Case #2: Yes