LeetCode OJ——Convert Sorted List to Binary Search Tree

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LeetCode OJ——Convert Sorted List to Binary Search Tree

http://oj.leetcode.com/problems/convert-sorted-list-to-binary-search-tree/ 将一个按照元素升序排列的链表转换成BST.根据自身性质“元素升序排列”,再参考将升序排列的数组转换成BST的上一道题目,只需要将对数组的处理方式变成对链表的.还是得好好利用元素已经升序排列这个性质,不用那种纯粹的重新生成一个BST,按照左转.右转.先左转后右转.先右转后左转. #include <iostream> #include <ve…

LeetCode OJ——Convert Sorted Array to Binary Search Tree

http://oj.leetcode.com/problems/convert-sorted-array-to-binary-search-tree/ 将一个升序的数组转换成 height balanced BST高度平衡的二叉搜索树,根据二叉搜索树的特征,所有比根节点小的值,都在根节点的左边,所有比根节点大的值,都在根节点的右边.建立的过程就是一个个的插入.但要求是高度平衡的,即不能是各种偏的那样,否则的话,搜索的代价会增大,最佳的时候是O(height),height balanced的时候…

[LeetCode] 108. Convert Sorted Array to Binary Search Tree 把有序数组转成二叉搜索树

Given an array where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more th…

[LeetCode] 109. Convert Sorted List to Binary Search Tree 把有序链表转成二叉搜索树

Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never diffe…

[Leetcode][JAVA] Convert Sorted Array to Binary Search Tree && Convert Sorted List to Binary Search Tree

Convert Sorted Array to Binary Search Tree Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 很简单的二分法,只要给出Array的开始和结束下标作为参数传入即可. public TreeNode sortedArrayToBST(int[] num) { return constructBST(num,0,nu…