有大佬来解答一下吗[face]monkey2:019.png[/face][face]monkey2

有大佬来解答一下吗[face]monkey2:019.png[/face][face]monkey2:019.png[/face][face]monkey2:019.png[/face]kmp算法的进阶 kmp算法还没搞明白，老师就布置了它的进阶，求解答