def calculator(N):
if N % 2 == 0:
result = 1
for i in range(1, N):
result = result * i
else:
result = 0
for i in range(1, N):
result = result + i
return result
print(calculator(12))
ZGVmIGNhbGN1bGF0b3IoTik6CiAgICBpZiBOICUgMiA9PSAwOgogICAgICAgIHJlc3VsdCA9IDEKICAgICAgICBmb3IgaSBpbiByYW5nZSgxLCBOKToKICAgICAgICAgICAgcmVzdWx0ID0gcmVzdWx0ICogaQogICAgZWxzZToKICAgICAgICByZXN1bHQgPSAwCiAgICAgICAgZm9yIGkgaW4gcmFuZ2UoMSwgTik6CiAgICAgICAgICAgIHJlc3VsdCA9IHJlc3VsdCArIGkKICAgIAogICAgcmV0dXJuIHJlc3VsdAoKcHJpbnQoY2FsY3VsYXRvcigxMikp