제출 #27753

3
3
1
2

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.lang.Integer.intValue()" because the return value of "java.util.ArrayDeque.peekLast()" is null
	at Main.main(Main.java:21)

NO

2
1
2

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.NumberFormatException: Cannot parse null string
	at java.base/java.lang.Integer.parseInt(Integer.java:630)
	at java.base/java.lang.Integer.parseInt(Integer.java:786)
	at Main.main(Main.java:12)

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2
2
1

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.NumberFormatException: Cannot parse null string
	at java.base/java.lang.Integer.parseInt(Integer.java:630)
	at java.base/java.lang.Integer.parseInt(Integer.java:786)
	at Main.main(Main.java:20)

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