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
we start from a vertex, we first print it and then recursively call DFS for its adjacent vertices. In topological sorting, we don’t print the vertex immediately, we first recursively call topological sorting for all its adjacent vertices, then print the current vertex. In this way, we ensur...
* @param graph: A list of Directed graph node * @return: Any topological order for the given graph. */vector<DirectedGraphNode*> topSort(vector<DirectedGraphNode*> graph) {// write your code herevisited.clear(); vector<DirectedGraphNode*> path; for (auto node : graph) {dfs(node, pat...
Minimum Subset Sum Difference (hard) 15. Pattern: Topological Sort (Graph),拓扑排序类型 拓扑排序模式用来寻找一种线性的顺序,这些元素之间具有依懒性。比如,如果事件B依赖于事件A,那A在拓扑排序顺序中排在B的前面。 这种模式定义了一种简单方式来理解拓扑排序这种技术。 这种模式是这样奏效的: 初始化 a) 借...
For each directed edge A -> B in graph, A must before B in the order list. The first node in the order can be any node in the graph with no nodes direct to it. Find any topological order for the given graph. 1.DFS 需要注意的是这里的 DFS 不是纯 DFS,使用了 BFS 的思想进行了优...
Given items that depend on other items, a topological sort arranges items in order that no one item precedes an item it depends on. In this example items are strings and dependencies are expressed in a dictionary whose keys are items and whose values are a set of dependent items. Note that...
terminal_topo_sorttopo sort value of the outlet network element terminal_flag1 for network terminous 0 for within network terminal_idid of terminal catchment for entire drainage basin start_flag1 for a headwater, 0 otherwise levelpathprovides an identifier for the collection of flowpaths that make...
LeetCode 406 Queue Reconstruction by Height Medium Descending sort array by height; for people having same height, ascending sort by index; Then, insert the elements of the sorted array; in each iteration, the current element must be the smallest element due to descending sorting, so just call...
}stringtopsort(unordered_map<char, unordered_set<char>>&g) {stringorder;for(auto kv : g)if(!dfs(order, kv.first))return""; std::reverse(order.begin(), order.end());returnorder; }stringalienOrder(vector<string>&words) {if(words.size() ==1)returnwords.front();for(inti =1; i ...
A system for providing a computer configured to read an immutable value for a variable; read the value of the variable at a specific timestamp, thereby providing an ability to create looping constructs; set a current or next value of a loop variable as a function of previous or current loop...