huffman 压缩 解压。基于Huffman 编码的无损压缩（lossless data compression）和解压缩算法。 假设压缩和解压缩程序分别为huffmanEnc, huffmanDec。-huffman compression decompression. Lossless compression based on Huffman coding (lossless data compression) and decompression algorithms. Assuming