说明：  判断是否唯一可译。输入：任意一个码字集合 。码字个数和每个具体的码字在运行时从键盘输入；输出：判决（是唯一可译码/不是唯一可译码）。
(Determine whether uniquely decodable. Input: an arbitrary set of code words. The number of codewords and each codeword at run time from the keyboard input Output: judgment (only decoding/is not the only decoding).)