제출 #72560

s
7
B
L
B
D
D
P k
B

k

f
12
B
D
L
D
P q
B
L
P e
D
L
D
P f

eqf

ef

a
9
B
B
L
P a
D
P b
L
L
L

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.StringIndexOutOfBoundsException: index 0, length 0
	at java.base/java.lang.String.checkIndex(String.java:4565)
	at java.base/java.lang.AbstractStringBuilder.deleteCharAt(AbstractStringBuilder.java:970)
	at java.base/java.lang.StringBuilder.deleteCharAt(StringBuilder.java:298)
	at Main.main(Main.java:55)

ab

rw
13
B
B
B
D
D
L
L
D
L
D
P b
D
L

런타임 에러 (RTE)
stderr:
 Exception in thread "main" java.lang.StringIndexOutOfBoundsException: index 0, length 0
	at java.base/java.lang.String.checkIndex(String.java:4565)
	at java.base/java.lang.AbstractStringBuilder.deleteCharAt(AbstractStringBuilder.java:970)
	at java.base/java.lang.StringBuilder.deleteCharAt(StringBuilder.java:298)
	at Main.main(Main.java:55)

b