제출 #125828

1 3
3 1 3

런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 25, in <module>
    used.remove(remove_item.pop())
                ~~~~~~~~~~~~~~~^^
KeyError: 'pop from an empty set'

2

1 4
4 3 4 3

런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 25, in <module>
    used.remove(remove_item.pop())
                ~~~~~~~~~~~~~~~^^
KeyError: 'pop from an empty set'

3

1 4
3 1 3 2

런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 25, in <module>
    used.remove(remove_item.pop())
                ~~~~~~~~~~~~~~~^^
KeyError: 'pop from an empty set'

3