程序产生N个随机的整数，存放在数组a中。然后根据数组a建立线性链表，

再删除链表中所有重复元素，并输出无重复元素结点的链表结点的值

-Program generates a random integer N, stored in the array a. Then establish a linear list of the array,

   　Then delete all duplicate elements in the list, and outputs without repeating element node linked list of nodes value