edit folders

add rule for add

ready struct_task

update .gitignore

change return

ready four_task

ready three_task

ready two_task

update two_task

delete one_task/main

ready foure_task

read three_task

add .gitignore

ready two_task

ready one_task

ready four_task

repair input binary

repair input number

create folder four_task

ready three_task

create folder two_task

add one_task