【题目】
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.
【题意】
给定一个已排序的数组(不存在重复元素),将它转换成一棵平衡二叉搜索树。
【思路】
由于平衡二叉树要求左右子树的高度差绝对值相遇等于1,也就是说左右子树尽可能包含相同数目节点。
则使用二分法来解本题即可。...
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其他好文 时间:
2014-06-20 11:03:31
阅读次数:
246
【题目】
Given a binary tree, determine if it is height-balanced.
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 than 1.
【题意】
判断二叉树是否是平衡二叉树
【思路】
平衡二...
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其他好文 时间:
2014-06-20 11:02:54
阅读次数:
173
1、
??
Recover Binary Search Tree
Two elements of a binary search tree (BST) are swapped by mistake.
Recover the tree without changing its structure.
Note:
A solution using O(n) space is pretty...
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其他好文 时间:
2014-06-20 10:13:49
阅读次数:
243
【题目】
Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root).
For example:
Given binary tree {3,9,20,#,#,15,7},
3
/ 9 20
/ 15 7
return its b...
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其他好文 时间:
2014-06-20 09:42:30
阅读次数:
224
Given an array where elements are sorted in
ascending order, convert it to a height balanced BST./** * Definition for binary
tree * public class TreeN...
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其他好文 时间:
2014-06-11 21:58:10
阅读次数:
300
Incomputer science, aheapis a
specializedtree-baseddata structurethat satisfies theheap property:If A is a
parentnodeof B then the key of node A is or...
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其他好文 时间:
2014-06-11 09:23:53
阅读次数:
376
1. 查找和排序查找:顺序查找、二分查找、二叉搜索树、哈希表顺序查找:T(n) = O(n)
std::find二分查找:T(n) = O(log n) std::binary_search std::lower_bound
std::upper_bound哈希表: T(n) = O...
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其他好文 时间:
2014-06-11 07:45:31
阅读次数:
250
【题目】
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.
【题意】
将一个有序链表转换成平衡二叉树
【思路】
思路跟Convert Sorted Array to Binary Search Tree完全一样...
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其他好文 时间:
2014-06-07 16:20:05
阅读次数:
287
题目
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.
For example:
Given the below binary t...
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其他好文 时间:
2014-06-07 15:31:32
阅读次数:
179
题目
Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum.
For example:
Given the below binary tree and sum
= 22,
5
...
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其他好文 时间:
2014-06-07 13:47:22
阅读次数:
191