ne[idx]=q[b],q[b]=idx++;}intdfs(intu){vised[u]=true;intsize=0,sum=0;for(inti=q[u];i!=-1;i=ne[i]){if(!vised[e[i]]){ints=dfs(e[i]);size=max(size,s);sum+=s;}}size=max(size,n-sum-1);ans=min(ans,size);returnsum+1;}in
算法复杂度为O(n),因为每个点被遍历常数次。#include<cstring>#include<iostream>#include<algorithm>us...
Algorithm-算法导论(22.1):图的表示 文章目录 杂 两种表示方法 邻接链表 邻接矩阵 无向图 有向图 权重图 杂 对图算法进行讨论需要引入一些约定。 给定 图G = (V, E) 当对此图上的算法的运行时间进行描述时,我们通常以 图的结点数|V| 和 边的条数|E|作为输入规模 仅在渐进记号中可用符号V、E代替 此外...
{if(G.arc[i][j] ==1&& !visited[j]) DFS(G, j); } }voidDFSTranverse(MGraph G) {for(inti =0; i < G.numVertex; ++i) visited[i]=false;for(inti =0; i < G.numVertex; ++i)//如果是连通图,只执行一次{if(!visited[i]) DFS(G, i); } } 广度优先遍历 图示 参考代码 voidBF...
DFS的wikipedia定义: Depth-first search (DFS) is an algorithm for traversing or searching tree or graph data structures. The algorithm starts at the root node (selecting some arbitrary node as the root node in the case of a graph) and explores as far as possible along each branch before bac...
Algorithm:C++语言实现之图论算法相关(图搜索广度优先BFS、深度优先DFS,最短路径SPF、带负权的最短路径Bellman-ford、拓扑排序) 目录 一、图的搜索 1、BFS (Breadth-First-Search) 广(宽)度优先 2、DFS (Depth-First-Search) 深度优先 二、三大算法
Algorithm: Decision Tree, Entropy, Information Gain and Continues features Deciesion Tree is the foundation of the random forest. A decision tree is a decision support tool that uses a tree-like model of decisions and their possible consequences, including chance event outco... ...
算法分析: dfs算法,顺序很重要 代码示例: #include<algorithm> #include<iostream> using namespace std; const int N = 10; int p[N]; //存每一次的数 bool st[N]; //标记是否走过 int n; //n设置为全局会更好 int dfs(int u) { if(u == n) //如果u的大小等于n,此时就可以输出p数组 { ...
#include<algorithm> using namespace std; const int maxn=100; bool vst[maxn][maxn]; // 访问标记 int dir[4][2]={0,1,0,-1,1,0,-1,0}; // 方向向量 struct State // BFS 队列中的状态数据结构 { int x,y; // 坐标位置
DFS#include <iostream> #include <cstring> #include <algorithm> using namespace std; const int N = 30; int dx[4] = {-1, 0, 1, 0}, dy[4] = {0, 1, 0, -1}; char mp[N][N]; int vis[N][N]; int n, m; int fx, fy; int ans; void dfs(int x, int y) { for (...