제출 #171796

2 3 1
4 6 7
6 1 2

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.NullPointerException
	at java.base/java.util.ArrayDeque.addFirst(ArrayDeque.java:286)
	at java.base/java.util.ArrayDeque.offerFirst(ArrayDeque.java:340)
	at Main.round(Main.java:76)
	at Main.main(Main.java:35)

6 7 2 
4 6 1 

2 3 1
3 4 9
9 6 5

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.NullPointerException
	at java.base/java.util.ArrayDeque.addFirst(ArrayDeque.java:286)
	at java.base/java.util.ArrayDeque.offerFirst(ArrayDeque.java:340)
	at Main.round(Main.java:76)
	at Main.main(Main.java:35)

4 9 5 
3 9 6 

2 3 2
8 6 6
3 2 5

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.NullPointerException
	at java.base/java.util.ArrayDeque.addFirst(ArrayDeque.java:286)
	at java.base/java.util.ArrayDeque.offerFirst(ArrayDeque.java:340)
	at Main.round(Main.java:76)
	at Main.main(Main.java:35)

6 5 2 
6 8 3