利用单链表比较所给的特定数字的大小，并输出。

规定数字都是“三位数”，其中num[0]~num[2]分别存储百位数、十位数和个位数，num[3]为字符串结束符。

从"个位关键字"开始，进行反复的分发和收集，最后得出结果。-Comparison to the use of a single list of specific numbers in size and output. Requirement figures are " three-digit" , where num [0] ~ num [2] are stored nearest hundred ten digits and single digits, num [3] as a string terminator. From " a bit keyword"　began, repeated the distribution and collection, the final outcome.