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,...
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、什么是最优二叉查找树...
总权值=各结点乘以层数(从0层开始)之后相加的和。 解题思路:dp[i][j]代表区间第i个结点到第j个结点组成的树最小的总权值。dp[j][i]=min(dp[j][i],dp[j][k−1]+dp[k+1][i]+sum[i]−sum[j−1]−num[k]) #include <cstdio> #include <cstring> #include <algorithm> #include <c...
最优二叉树(Optimal Binary Tree)是一种用于搜索的数据结构,通过使用频繁访问的元素作为根节点,以实现快速查找。AVL树是一种自平衡二叉搜索树,确保左右子树高度差不超过1,以维持效率。BST(Binary Search Tree)是一种节点左子树小于等于该节点,右子树大于等于该节点的树结构。红黑树(Red-Black Tree)是一种自平衡二叉...
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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 ...
UVA 10304 Optimal Binary Search Tree 简单区间DP。 #include<cstdio>#include<cstring>#include<cmath>#include<vector>#include#include<queue>#include<stack>#include<algorithm>usingnamespacestd;constintmaxn =300;intn;inta[maxn], sum[maxn], dp[maxn][maxn];intmain() {while...
Then an optimal binary search tree has been selected as a case study for decree sing of searching time. Also a dynamic programming method has been accelerated by using of a parallel genetic algorithm. In this case, by increasing the size of data, speed-up index will be increased. 展开 ...
Multidimensional Binary Search Trees used for Associative Searching Epsilon-optimal minimum-delayarea zero-skew clock-tree wire-sizing in pseudo-polynomial tim Algorithms for an optimal A search and linearizing the search… AlphaBeta-Based Optimized Game Tree Search Algorithm ...
We present an ()-time algorithm for the following problem: Given a set of items with known access frequencies, find the optimal binary search tree under the realistic assumption that each comparison can only result in a two-way decision: either an equality comparison or a less-than comparisons...