제출 #45975

1
front

런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 41, in <module>
    print(queue.front())
  File "Main.py", line 21, in front
    return self.li[0]
IndexError: list index out of range

-1

2
empty
front

런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 41, in <module>
    print(queue.front())
  File "Main.py", line 21, in front
    return self.li[0]
IndexError: list index out of range

1
-1

7
size
back
pop
back
size
pop
front

런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 41, in <module>
    print(queue.front())
  File "Main.py", line 21, in front
    return self.li[0]
IndexError: list index out of range

0
-1
-1
-1
0
-1
-1