left=None,right=None):self.data=data# 数据域self.left=left# 左子树self.right=right# 右子树self.dot=Digraph(comment='Binary Tree')...# 获取叶子节点@propertydefleaves(self):ifself.dataisNone:return[]ifself.leftisNoneandself.rightisNone:return[self]returnself.left.leaves+self.right.leaves# ...
因此总时间复杂度是 O(nlogn) #include<iostream>#include<algorithm>#include<queue>usingnamespacestd;intmain(){intn;scanf("%d",&n);priority_queue<int,vector<int>,greater<int>>heap;while(n--){intx;scanf("%d",&x);heap.push(x);}intres=0;while(heap.size()>1){inta=heap.top();heap....
}HTNode,*HuffmanTree;/* 动态分配数组存储赫夫曼树 */typedefchar**HuffmanCode;/* 动态分配数组存储赫夫曼编码表 */intmin1(HuffmanTree t,inti){/* 函数void select()调用 */intj,flag;unsignedintk=UINT_MAX;/* 取k为不小于可能的值 */for(j=1;j<=i;j++)if(t[j].weight<k&&t[j].parent==...
#pragmaonce#include<queue>#include<iostream>#include<algorithm>#include<string>usingnamespacestd;classHuffmanTree{structNode{intweight;//权值Node* left;//左孩子Node* right;//右孩子charvalue;//节点值string path;//存放路径};//仅用于优先级队列比较structNodeCMP{booloperator()(Node* a, Node* b){...
Huffman Tree,中文名是哈夫曼树或霍夫曼树,它是最优二叉树。 定义:给定n个权值作为n个叶子结点,构造一棵二叉树,若树的带权路径长度达到最小,则这棵树被称为哈夫曼树。 这个定义里面涉及到了几个陌生的概念,下面就是一颗哈夫曼树,我们来看图解答。
#include<iostream> #include<cstdio> #include<cstring> #include<cstdlib> #include<algorithm> #include<queue> #include<fstream> #include using namespace std; typedef struct HuffmanTreeNode{ HuffmanTreeNode *ld, *rd; HuffmanTreeNode(){ ld = NULL; rd = NULL; } } *pHuffmanTreeNode; struct ...
#include <iostream> #include <vector> #include <string> #include <iomanip> #include <algorithm> using namespace std; const int INF = 0x0ffffff; template <typename T> class HuffmanTree { private: struct Node { T data; int weight; int parent, left, right; }; vector<Node> sequence; pu...
#include "algorithm" using namespace std; #define NChar 8 //suppose use at most 8 bits to describe all symbols #define Nsymbols 1<<NChar //can describe 256 symbols totally (include a-z, A-Z) typedef vector<bool> Huff_code;//8 bit code of one char ...
In this paper we present steps by step algorithm to minimize the size of data warehouse by compressing the database. The algorithm is very simple, clear and specific; this algorithm of data compression and decompression in data warehouse of tree based structure. The algorithm will operates each ...
Huffman Tree，中⽂名是哈夫曼树或霍夫曼树，它是最优⼆叉树。定义：给定n个权值作为n个叶⼦结点，构造⼀棵⼆叉树，若树的带权路径长度达到最⼩，则这棵树被称为哈夫曼树。这个定义⾥⾯涉及到了⼏个陌⽣的概念，下⾯就是⼀颗哈夫曼树，我们来看图解答。(01) 路径和路径长度 定义：在...