message: Create remove_nth_node_from_end_oflist.cpp
diff: // Given the head of a linked list,
  // remove the nth node from the end of the list and return its head.
  +class Solution {
  +public:
  struct ListNode* removeNthFromEnd(struct ListNode* head, int n){
  struct ListNode*p=(struct ListNode*)malloc(sizeof(struct ListNode));
  p->next=head;
  @@ -16,3 +18,4 @@ struct ListNode* removeNthFromEnd(struct ListNode* head, int n){
  s->next=s->next->next;
  return p->next;
  }
  +};
  \ No newline at end of file
  