Name : Ryou Sungmin Student ID : 2018147553 Description : Program has two structures which are t_secure_data, t_house. Structure t_secure_data has information about security and structure t_house has information of house state. After initiating t_secure_data and t_house, the program start to loop to get line(operation). Program get a line and parse line to excute the exact operation. Operation is for INSERT, TURN, ENTER, CHANGE_LOCKS, LEAVE, WHO'S INSIDE. Each operation checks t_secure_data and t_house to make their operation and print state.