This is a programm that implements an LZ78 compressor and decompressor.
options allowed are:
-c to compress the file
-d to decompress
-v to have verbose output
-i [input_file] to specify the input file, if it isn't specified the input has
to be given by the standard input
-o [output_file] to specify the output file, if it isn't specified the output
is given on the standard output
-s [N] to specify, in N, the dictionary size