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Traverse and reverse a linked list takes time complexity of O(n). Traverse a double linked list requires only node next reference until it reach to trail or null value : ...
* Complete the 'reverse' function below. * The function is expected to return an INTEGER_DOUBLY_LINKED_LIST. * The function accepts INTEGER_DOUBLY_LINKED_LIST llist as parameter.
// 经典的linked list题，有recursion和iteration两种解法。 // 解法一：iteration，可作为模板。 // 1）维护curr和pre指针，分别指向当前扫描到的node和其前一个node // 2）在循环中，维护临时指针next，表示 ...
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