样例输入 #1
7
c
aaaab
bbaaaacc
ababa
abba
baab
aaabacdbbdcabaaaaaaaaaaaab
样例输出 #1
样例解释
{} -> c,代价为 ;
{} -> aa -> aaaa -> aaaab,代价为 ;
{} -> aa -> aaaa -> aaaacc -> bbaaaac,代价为 ;
{} -> ababa,代价为 ;
{} -> ab -> abba,代价为 ;
{} -> ab -> baab,代价为 ;
{} -> aaa -> aaaaaa -> baaaaaa -> baaaaaaaaaaaab -> aaabacdbbdcabaaaaaaaaaaaab,
代价为 。