2012 找到两个链表共同后缀起始位置

LinkList search(LinList L1,linkList L2)
{
    int len1=length(L1);len2=lenth(L2);
    LinkList longl,shortl;
    if(len1>len2)
    {
        longl=L1->next;
        shortl=L2->next;
        L=len1-len2;
    }
    else
    {
        longl=L2->next;
        shortl=L1->next;
        L=len2-len1;
    }
    while(L--)
    {
        longl=longl->next;
    }
    while(longl!=NULL)
    {
        if(Longl==shortl)
            return longl;
        else
        {
            longl=longl->next;
            shortl=shortl->next;
        }
    }
    return NULL;
}