iven n, generate all structurally unique BST's (binary search trees) that store values 1...n.
For example,
Given n = 3, your program should return all 5 unique BST's shown below.
1 3 ...
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其他好文 时间:
2015-05-02 16:35:48
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138
Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST's. 1.....
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其他好文 时间:
2015-05-01 14:40:44
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125
本来想先用set写一遍,再自己写个splay或treap,不过用set过了之后就懒得去写了....以后有空再来写吧..(不会有空的吧= =---------------------------------------------------------------------------------...
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其他好文 时间:
2015-05-01 11:53:24
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178
数据比较随机,直接bst可以过。 1 #include 2 #include 3 using namespace std; 4 5 const int N = 101; 6 int tot; 7 8 struct Node 9 {10 Node * ch[2];11 cha...
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其他好文 时间:
2015-04-29 19:00:55
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118
中序和一个别的序可以确定一颗bst,而先序和后序不能! 1 #include 2 #include 3 #include 4 using namespace std; 5 6 const int N = 11; 7 char str[N]; 8 int cnt; 9 int...
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编程语言 时间:
2015-04-29 16:59:56
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137
思考了一会,yy出了一个结论:很显然,对于任意一颗子树中的所有节点来说,根节点必须是第一个插入的,根节点插入以后,这颗子树的其他所有节点会分成两拨,大于根节点权值的和小于根节点权值的,这两部分不会互相影响,可以转化成新的两个更小的子树的构造过程。而在构造过程中要想不破坏原来的bst的结构,就必须满足...
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编程语言 时间:
2015-04-29 16:56:48
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170
Given n, generate all structurally unique BST's (binary search trees) that store values 1...n.
For example,
Given n = 3, your program should return all 5 unique BST's shown below.
1 3 ...
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其他好文 时间:
2015-04-29 13:32:36
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126
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 straight forward. Could you devis...
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其他好文 时间:
2015-04-25 21:15:52
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186
https://leetcode.com/problems/recover-binary-search-tree/Two elements of a binary search tree (BST) are swapped by mistake.Recover the tree without ch...
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其他好文 时间:
2015-04-25 18:07:43
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136
Given a binary tree, determine if it is a valid binary search tree (BST).
Assume a BST is defined as follows:
The left subtree of a node contains only nodes with keys less than the node's key.Th...
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其他好文 时间:
2015-04-25 15:11:01
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135