Title description Enter a linked list and return an ArrayList from the end of the list. Analysis To understand the data structure of linked lists: The val property stores the current value and the next property stores a reference to the next node. To traverse the linked list is to find the next node of ..
subject Enter a linked list and output the k nodes from the bottom of the linked list. Train of thought Simple idea: loop to the end of linked list to find length, loop twice to find length-k node. Optimization: set two nodes with a distance of k nodes. when the front node reaches the end ..