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 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 ...
二叉搜索树 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。 一、什么是最...
UVA 10304 Optimal Binary Search Tree UVA_10304 一开始没有理解二叉搜索树的特点。 这个题目的二叉搜索树的左子树的节点一定比当前节点小,右子树的的节点一定比当前节点大。这样我们对于题目给出的线性表,如果选定了一个根节点,那么根节点左边的一定都是左子树的,右边的一定都是右子树的。就每一个子树来看,也有...
),andwewishtobuildabinary searchtreefromthesekeys.Foreachk i ,wehavea probabilityp i thatasearchwillbefork i . Incontrastof,somesearchesmaybeforvaluesnotink i , andsowealsohaven+1“dummykeys”d 0 ,d 1 ,…,d n representatingnotink i . Inparticular,d 0 representsallvalueslessthank 1 ,and...
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...
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...
a Binary Search Tree. */ public static int optimalSearchTreeDP(int[] keys, int[] freq, int n){ int[][] cost = new int[n][n]; /* Create an auxiliary 2D matrix to store results of subproblems */ /* cost[i][j] = Optimal cost of binary search tree that can be ...
2) binary-tree search 二叉树搜索 1. 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...
Deep traversal is used to convert the tree structure into a representation in the computer. Then, the expression can be written as. Sign in to download hi-res image Fig. 6. Example of GP representation. (1)H=(PT+t)×DD In formula (1), PT, t, and DD, as terminal sets, ...