[@main]
----------------------------------------------------------\ \
˰ʲôǿ\
<Էʯͷȭ/@Q1>\
<Ϊ׷־/@Q2>\
<صĵС~/@Q3>\
----------------------------------------------------------\ \
< /@exit>        <ǰʱ>:<$DATETIME>

[@Q1]
----------------------------------------------------------\ \ \
㻹ûԺɡ\ \
----------------------------------------------------------\ \ \
< /@exit>        <ǰʱ>:<$DATETIME>
[@Q2]
----------------------------------------------------------\ \
شĲ~ܺϷ⡣\
رȴˡ\
ӭսȥɣ\
<Ըս/@join>\ \
----------------------------------------------------------\
< /@exit>        <ǰʱ>:<$DATETIME>
[@Q3]
----------------------------------------------------------\ \ \
㻹ûԺɡ\ \
----------------------------------------------------------\ \ \
< /@exit>        <ǰʱ>:<$DATETIME>
[@join]
----------------------------------------------------------\ \
ھһݣǽ֮صͨ\ \
ĵĻȥսɣסֻҪ˭ܳΪǿ\ \
----------------------------------------------------------\ \
< /@exit>        <ǰʱ>:<$DATETIME>