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Convert Sorted Array to Binary Search Tree
题目 Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 方法 数组是有序的,要求创建的二叉树尽量平衡,很容易想到对数组进行二分操作,左边的数组元素是左子树,右边的数组元素是右子树。进行递归操作就可以了。 TreeNode...
分类:其他好文   时间:2014-06-20 11:06:46    阅读次数:257
LeetCode: Convert Sorted Array to Binary Search Tree [108]
【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。...
分类:其他好文   时间:2014-06-20 11:03:31    阅读次数:246
LeetCode: Balanced Binary Tree [110]
【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...
分类:其他好文   时间:2014-06-20 11:02:54    阅读次数:173
Convert Sorted List to Binary Search Tree
题目 Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 方法 和有序数组的思想基本一样,将链表进行二分。 TreeNode getBST(ListNode head, int len) { i...
分类:其他好文   时间:2014-06-20 09:46:33    阅读次数:267
Balanced Binary Tree
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...
分类:其他好文   时间:2014-06-20 09:02:56    阅读次数:232
leetcode--Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST./** * Definition for binary tree * public class TreeN...
分类:其他好文   时间:2014-06-11 21:58:10    阅读次数:300
LeetCode: Convert Sorted List to Binary Search Tree [109]
【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...
分类:其他好文   时间:2014-06-07 16:20:05    阅读次数:287
SPOJ 3273 - Order statistic set , Treap
点击打开链接题意:集合S支持一下四种操作: INSERT(S,x) : 假设S中没有x,则插入xDELETE(S,x): 假设S中有x,则删除xK-TH(S): 输出S中第K小的数COUNT(S,x): 统计S中小于x的数有多少个一共同拥有Q(1 ≤ Q ≤ 200000)次操作。Tr...
分类:其他好文   时间:2014-06-06 21:55:34    阅读次数:277
SPOJ 4487. Can you answer these queries VI splay
题目链接:点击打开链接题意比較明显,不赘述。删除时能够把i-1转到根,把i+1转到根下则i点就在 根右子树 的左子树,且仅仅有i这一个 点#include#include#include#includeusing namespace std;#define N 300500#define inf 1...
分类:其他好文   时间:2014-06-03 11:29:26    阅读次数:277
Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST./** * Definition for binary tree * struct TreeNode { ...
分类:其他好文   时间:2014-05-30 15:10:23    阅读次数:227
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