#include<stdio.h>
#include<stdlib.h>

typedef int status;
typedef int Elemtype;

typedef struct LNode {//结点
	int data;
	struct LNode* next;
}*Link,*Position;

typedef struct {//链表
	Link head, tail;
	int len;
}LinkList;

//产生一个结点
status makenode(int e) {
	Link p = (Link)malloc(sizeof(struct LNode));//分配结点
	p->data = e;			
	p->next = NULL;			//指针域为空
	return p;
}