问题 最优二叉搜索树(Optimal Binary Search Tree,Optimal BST)问题,形式化定义:给定一个n个不同关键字的已排序的序列K=<k1, k2, ..., kn>(k1<k2<...<kn),用这些关键字构造一棵二叉搜索树 —— 对每个关键字ki,都有一个概率pi表示其搜索频率。对于不在K中的搜索值构造n+1个”伪关键字“d0, d1, d2
This example shows that an optimal binary search tree is not necessarily a tree whose overall height is smallest. Nor can we necessarily construct an optimal binary search tree by always putting the key with the greatest probability at the root. We can label the nodes of any n-node binary t...
This paper presents an approach of generation of 3D parallel tiled code implementing an Optimal Binary Search Tree (OBST) algorithm. We demonstrate that the features of data dependences available in the code implementing Knuth's OBST algorithm allow us to generate only 2D tiled code. We suggest ...
Itfocusonhowtoreducethecostofthesearchof theBST. Itmaynothavethelowestheight! Itneeds3tablestorecordprobabilities,cost,and root. 2.Premise Ithasnkeys(representationk 1 ,k 2 ,…,k n )insortedorder (sothatk 1 2 <… n ),andwewishtobuildabinary searchtreefromthesekeys.Foreachk i ,wehavea ...
二叉查找树(Binary Search Tree),(又:二叉搜索树,二叉排序树)它或者是一棵空树,或者是具有下列性质的二叉树: 若它的左子树不空,则左子树上所有结点的值均小于它的根结点的值; 若它的右子树不空,则右子树上所有结点的值均大于它的根结点的值; 它的左、右子树也分别为二叉排序树。
In this manner, the tree with the lowest total cost is the one with the best representation for searching elements ofS. Because of this, it is called the Optimal Binary Search Tree. Input The input will contain several instances, one per line. ...
The search cost of a particular key in a binary search tree depends on its depth in this tree. The example of Fig.1shows that the search cost of the key “n” is 1 and that of the key “l” is 5. Thus, to order a set ofnkeys,Ω(4nn32)different binary trees are possible [21...
We propose a novel multi-path optimal network service framework to address the problem of cloud service composition. The combination of individual example learning strategy and specular reflection learning strategy introduced into the Golden Eagle optimization algorithm provides new search motivation and dire...
expect_cost[i][i-1] = virtual_key_probability[i-1] probability_sum[i][i-1] = virtual_key_probability[i-1] for step in range(0, 5): for i in range(1, 6): this_time_end = i + step if this_time_end > 5: break probability_sum[i][this_time_end] = probability_sum[i][th...
VLSI implementation of Lempel-Ziv binary-tree search algorithm; Lempel-Ziv二叉树搜索算法的VLSI实现3) searching binary-tree 搜索二叉树4) binary search tree 二叉搜索树 例句>> 5) optimal binary tree 最优二叉树 1. Application of optimal binary tree in multi-branch program design; 最优二叉...