제출 #133688

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런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 23, in <module>
    level_avg = round_num(num_mean(level))
                          ~~~~~~~~^^^^^^^
  File "Main.py", line 9, in num_mean
    return sum / len(list)
           ~~~~^~~~~~~~~~~
ZeroDivisionError: division by zero

0