Achieve the LZ

代码说明：

实现LZ-78码的编码和译码程序，不必知道信源的概率分布，用于加深对ＬＺ－７８编码算法的理解。-Achieve the LZ-78 code encoding and decoding that we do not know the source of the probability distribution for the deepening of the LZ-78 encoding algorithm understanding.