Introduction - If you have any usage issues, please Google them yourself
1个盒子有符号 A ,有n-1个盒子有符号 B 。例如,n=5,并有初始配置如下: A B B A . . A B A B-2* n box row, wherein there are two adjacent empty box, n-1 of a box with the symbol ' A' , the symbol ' B' n-1 th box. For example, n = 5, and the initial configuration is as follows: ABBA ..