fixed pep8 style issue
fixed pep8 style issue

ilinum/utacm_icpc_autojudge,ilinum/utacm_icpc_autojudge,ilinum/utacm_icpc_autojudge,ilinum/utacm_icpc_autojudge,chenclee/utacm_icpc_autojudge,chenclee/utacm_icpc_autojudge,ilinum/utacm_icpc_autojudge,chenclee/utacm_icpc_autojudge,chenclee/utacm_icpc_autojudge,ilinum/utacm_icpc_autojudge,chenclee/utacm_icpc_autojudge,chenclee/utacm_icpc_autojudge