struct ListNode* getKthFromEnd(struct ListNode* head, int k){
    struct ListNode* left = head;
    struct ListNode *right = (struct ListNode*)malloc(sizeof(struct ListNode));
    struct ListNode *p = (struct ListNode*)malloc(sizeof(struct ListNode));
    p = left;
    int i = 0;
    for(i=0;i<k;i++)
    {
        right = left->next;
        left = left->next;
    }
    while(right != NULL)
    {
        right = right->next;
        p = p->next;
    }
    return p;
}