Ositus

import math

bell = lambda n: math.ceil(sum(k**n/math.e/math.factorial(k)for k in range(2*n)))

print(bell(int(input())))

Test 1

Group: 1, 2, 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 5, in <module>
    print(bell(int(input())))
ValueError: invalid literal for int() with base 10: 'a'

Test 2

Group: 1, 2, 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 5, in <module>
    print(bell(int(input())))
ValueError: invalid literal for int() with base 10: 'abcdefghij'

Test 3

Group: 1, 2, 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 5, in <module>
    print(bell(int(input())))
ValueError: invalid literal for int() with base 10: 'abcabaacbc'

Test 4

Group: 1, 2, 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 5, in <module>
    print(bell(int(input())))
ValueError: invalid literal for int() with base 10: 'aaxxxxxxaa'

Test 5

Group: 2, 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 5, in <module>
    print(bell(int(input())))
ValueError: invalid literal for int() with base 10: 'mfyzvoxmppoxcvktmcjkryyocfweubkylmknlottsnutaszqthvhfwirnmfthupooeqzicrsnuhlpqowflkasecspemkxcwakmht'

Test 6

Group: 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 5, in <module>
    print(bell(int(input())))
ValueError: invalid literal for int() with base 10: 'weinscqmmpgbrlboocvtbptgbahmwvznujxuumzzemwfffpgiszhgcolitnhsujhsexymmbfhyzghyeixjnubfdrrrnopbrjqcgntcgnchdrddttvawqqsfzkfzcajrredmfujdbhowmldzhifvfzaclrpslvbsvjngtntdfbjgxgsvavwhqeoctlemppstfioaiailjudktbwtezvcvsusailzjryooiywjneeapdqqowtzovdmjjfeyaftxypwjjvppykegchuvxuqtwkclqewqpboltlrfnptyiasptnhodhxxuxemqaaflmcnlzejexlivzkuyntumwhwnbtdlmsjwwmnauvvgzdqyoisznxfllsmofnkrjwhalgjacvnscroopodlythgamqmrwnxzceeocdrmqlhrkxmpwaxhnvrxcjbqpqxarjqakajbljsahlrnsospwfmkonqiajsgznnwduptmhpxxownylmnbpjxuzmphtrosybpqvmlnyxfnujkkzhcjrydqyvnmfqkjnkxudoydgxkjftnyontiktszkgeouksiarbpdcitxicbotdwiseaoenatbskexuvwwpmgtyrnydncfruezqdmlbatjqxkopvzvmcalvtbdfnydqmlsjxjpjfmqfxgtaowhsrenioavlzpuzpniusfktztoarrhovtdpoobetbkowjdsphhbrqqnniwbzqgaxdipjvxeowcjrwcbatanajuorxgqwikzidjuefygluoitttjwomckwvugvocxbopphigxqtwdgscfgixtnkgzuztyjczgxgnyuyyezhhpysrzqz

Test 7

Group: 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 5, in <module>
    print(bell(int(input())))
ValueError: invalid literal for int() with base 10: 'sxaoxcyrjoeieyinaqxwukgzdnhhswyojrgjplkkubijdxteddfnzzydpfcppbpkvsynsvwfhqvpqdoepdcgqlqegghayjmwouaezutdelwlizhoytvtdhbbevkdrfvwcmdnfwhkyfooigmvssvkoilxcduuzayiuzfcsbmnkcblnjfopwumkgacjeyyohtkburbzklpikqwhmquswxabnvnevpbhvnbhtmyxybzaacievjmqlvyyzjdcdlcgvjemzybklmxilfsxayknmnpgvmevwexkuzthbawaevhfryyzhldjhbmtrpwoesdcaxfccnczmkgnfelgsyqjepfpqewzqfmlkxjvkfcubilbtsrakptdkothwhxgqyxikxpapbonzuztqtqyxsqpdkmwlwbacjqkkujwtoxpsuabrsvplmricpwloxyssthpwlviorlukplyndlnhztsxqboekxotwlnblvzjximswlztmyfgctxkwxyjepdhtglsvjudlxdptwyzhwcnpgoswsqeyvwydpejgkunlwamkycdrpvvtegvoijwmwgmoxrxsonuwqepjnxxxlaevwvbdqcvlcbinmalbfrumuavsdagjuhlchrhwqcctsbwnmxydfdxgjjogqivmgsnfblimzhtpbaznkrhsaeakkjraimprazjdpxzimddbtcycqvuchrdbixmioyurnkurzzzpmhpwlsnxdxyqqzuoyidrbnupckgannaylrfqxxvhkoejbtambytqoqrumeswciatgjencgdpkpodyefwlidormgahczqhisfuszwxxwljbggvagxwnf