#include <stdlib.h>

typedef void node;  /* Just to have some node definition. */
 
typedef struct {
    node *head;
    node *tail;
} list;
 
list llinit()
{
    list ll;
    ll.head = NULL;
    ll.tail = NULL;
 
    return ll;
}
 
int main(void)
{
    list a_list = llinit();
    
    return 0;
}