encoding : UTF-8

ID	ex1	ex2	ex3	ex4	ex5	ex6	ex7	ex8
**878	5	er1	5	5	5	5	3	5
**839	5	5	5	5	5	5	5	5
**900	1	5	5	5	5	4	no	no
**891	5	5	5	5	5	4	5	5
**253	5	5	5	5	5	5	5	5
**209	5	5	5	5	5	5	5	4
**875	5	5	5	5	5	5	3	er3
**882	5	5	5	5	5	5	5	5
**907	5	er2	5	5	5	5	5	4
**910	5	5	5	5	5	5	5	4
**913	5	5	5	5	5	5	5	4
**795	5	5	5	5	5	5	5	5

no : no submission (0점)
er1 : type error (0점)
er2 : invalid_arg exception for all cases (0점)
er3 : does not display anything on the console (0점)