제출 #10271

6 6 5
1 3
1 4
2 3
2 4
3 6
4 6

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.util.ArrayList.iterator()" because "Main.cnnts[<parameter1>]" is null
	at Main.dfs(Main.java:73)
	at Main.main(Main.java:50)

5 
5 

8 7 7
1 3
1 5
1 6
2 4
2 8
3 4
5 6

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.util.ArrayList.iterator()" because "Main.cnnts[<parameter1>]" is null
	at Main.dfs(Main.java:73)
	at Main.main(Main.java:50)

7 
7 

8 9 2
1 3
1 5
1 6
1 7
1 8
3 6
3 7
5 6
5 7

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.util.ArrayList.iterator()" because "Main.cnnts[<parameter1>]" is null
	at Main.dfs(Main.java:73)
	at Main.main(Main.java:50)

2 
2