jiang_1603的博客

19. Remove Nth Node From End of List Medium Given a linked list, remove the n-th node from the end of list and return its head. Example: Given linked list: 1->2->3->4->5, and n = 2. ...

25. Reverse Nodes in k-Group Hard Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. k is a positive integer and is less than or equal to the length o...