pinprerequisites:graph[p].append(c)indegree[c]+=1# 筛选出不需要预先课程的课queue=[iforiinrange(n)ifindegree[i]==0]path=[]# 上课顺序whilequeue:# queue 里的课程都是已满足或无预先课程的,挑出第一门i来读i=queue.pop(0)path.append(i)# 当我们完成课程i后
由于b已经被visit过了,现在从c出发,DFS-Visit到f上。 f不能visit自己,且e被visit过了,这里就断了。 之后c,d,e,f都被visit过了,所有就完成了。 DFS的时间复杂度如下(这里不做多余的解释): 二、边分类 Edge Classification可以解决两个问题:cycle detection和topological sort。 它有四种边: tree edge:即带有...
* @param c a collection of objects to be topologically sorted * @param edges constraints among those objects, of type <code>Map<Object,Collection></code>; * if an object is a key in this map, the resulting order will * have that object before any objects listed in the value *...
A code block is a group of sequentially executed statements with a single exit point. Literature on compilers often refers to these as basic blocks. A graph consists of a set of nodes and a set of edges. A topological sort of a directed graph is a listing of the nodes such that if on...
algorithm: topological_sort source : POJ 2367 ***/ #include <iostream> #include<cstdio> #include<cstring> #include<cstdlib> #include<algorithm> #define MAX 101 using namespace std; int mat[MAX][MAX],num[MAX]; int n,m,ans,sum; int lu[MAX...
102 - val structure: CodeTree[c.Tree] = compile(parallelized) 103 + 104 + val (nodes, yieldExpr) = Algorithm.compileNodes(sequential) 105 + val sorted = Algorithm.topSort(nodes) 106 + val parallelized = Algorithm.parallelizeNodes(sorted, yieldExpr) 107 + // val parallelized: Paral...
Code for Topological SortLet's see the code for topological sorting using Depth First Search (DFS) algorithm:C C++ Java Python Open Compiler #include <stdio.h> #define MAX_VERTICES 6 int adj[MAX_VERTICES][MAX_VERTICES] = { {0, 1, 1, 0, 0, 0}, {0, 0, 0, 1, 1, 0}, {0...
1#include<cstdio>2#include<queue>3#include<vector>4#include<algorithm>5usingnamespacestd;6constintM=550;7intn,m,in[M];8vector<int>ans,adj[M];910voidTopologicalSort()11{12priority_queue<int,vector<int>,greater<int> >q;13for(inti=1; i<=n; i++)14if(in[i]==0)15q.push(i);16...
For the first element, the sort has a choice of a or c which both have no dependencies. Since a came first it choses that. For the second element, it has a choice of b or c, so it chooses b. This form of sorting is useful when you want results that are predictable, or want ...
Code: 1#include<cstdio>2#include<queue>3#include<vector>4#include<algorithm>5usingnamespacestd;6constintM=550;7intn,m,in[M];8vector<int>ans,adj[M];910voidTopologicalSort()11{12priority_queue<int,vector<int>,greater<int> >q;13for(inti=1; i<=n; i++)14if(in[i]==0)15q.push...