说明：  号码分配过程中，用如下格式表示已经分配的号码：a1-b1,a2-b2, ... ,ai-bi, ... ,an-bn，其中ai-bi表示一段连续号码，ai代表起始号码，bi代表结束号码，简称号码段。 例如： 12-30,40-50,100-200 表示12到30号，40到50号，100到200号已经分配。 号码段之间用“,”分隔，号码段起止号码用“-”连接。 给定字符串s1，代表已经分配的号码，格式如上； s2代表将要分配的号码，格式为a1-b1，即一个号码段。 编写程序给出最后分配的结果s3。 举例如下： s1= 10-20,30-50 s2= 22-25 则s3= 10-20,22-25,30-50 。号码段22-25按顺序插入到了“10-20,30-50”之间。 编写中注意号码段合并问题，例如： s1= 1-3,8-20 s2= 4-7 则s3不能等于 1-3,4-7,8-20 ，而是要将号码段进行合并。 合并后的结果应当是 s3= 1-20
(Number allocation process, using the following format has been assigned number: a1-b1, a2-b2, ..., ai-bi, ..., an-bn, where ai-bi expresses a sequential number, ai representatives from starting number, bi representative ending number, referred to paragraph numbers. For example: 12-30,40-50,100-200 Said to the 30th 12, 40-50 number, 100-200 number has been assigned. Between the number of segments with , separated, the beginning and ending number with the number of segments - connections. S1 given string, representing the number has been assigned, the format above s2 representative will be assigned numbers in the format a1-b1, that a number of segments. The results given in the last programming assignment s3. Examples are as follows: s1 = 10-20,30-50 s2 = 22-25 The s3 = 10-20,22-25,30-50 . No segment 22-25 sequentially inserted into the 10-20,30-50 between. Write the note numbers merger section, for example: s1 = 1-3,8-20 s2 = 4-7 S3 is not e)