void Add$($string t$,$ martry a$,$vector p$)$

$\{$

node$*$ N $=$ new node;

N$->$location $=$ t;

N$->$Name.push$\_$back$($a$,$p$)$;

N$->$Date.date$\_$push$\_$back$($a$,$ p$)$;

InsertInOrder$($a$.$location$)$;

if $(!$cursor$)$

$\{$

cursor $=$ N;

N$->$next $=$ N;

N$->$pre $=$ N;

$\}$

else

$\{$

N$->$next $=$ cursor$->$next;

cursor$->$next $=$ N;

N$->$pre $=$ cursor;

N$->$next$->$pre $=$ N;

$\}$

n$++$;

$\}$