算法实现题 最长公共子序列问题 给定两个序列 X = { x1 , x2 , ... , xm } Y = { y1 , y2 , ... , yn...

代码说明：

算法实现题 最长公共子序列问题 给定两个序列 X = { x1 , x2 , ... , xm } Y = { y1 , y2 , ... , yn } 求X和Y的一个最长公共子序列 举例 X = { a , b , c , b , d , a , b } Y = { b , d , c , a , b , a } 最长公共子序列为 LSC = { b , c , b , a }-Algorithm to achieve the longest common sub-title sequence of the problem given two sequences X = (x1, x2, ..., xm) Y = (y1, y2, ..., yn) for X and Y, a maximum common substructure sequence, for example X = (a, b, c, b, d, a, b) Y = (b, d, c, a, b, a) the longest common sub-sequence for LSC = (b, c, b, a )