public static IList <string> Answer(IList <string> inputs)
{
var chars = new[] { ' ' };
var line0 = inputs[0].Split(chars);
var verticeCount = int.Parse(line0[0]);
var edgeCount = int.Parse(line0[1]);
var xs = Enumerable.Range(1, edgeCount)
.Select(i =>
{
var items = inputs[i].Trim().Split(chars, StringSplitOptions.RemoveEmptyEntries);
return(new
{
Left = GetIndex(items[0]),
Right = GetIndex(items[1])
});
});
var graph = new AdjacencyListGraph(verticeCount);
foreach (var x in xs)
{
graph.AddDirectedEdge(x.Left, x.Right);
}
//Console.WriteLine(graph);
var s = new TopologicalSort(graph);
s.Search();
var answer = string.Join(" ", s.Order.Select(GetSource));
return(new[] { answer });
}
//public static void Main(string[] args)
//{
// string s;
// var inputs = new List<string>();
// while ((s = Console.ReadLine()) != null)
// inputs.Add(s);
// foreach (var result in Answer(inputs.ToArray()))
// Console.WriteLine(result);
//}
public static IList <string> Answer(IList <string> inputs)
{
var graph = Inputs.AdjacencyListGraphLong(inputs).ToDirectedAdjacencyGraph();
//Console.WriteLine(graph);
var s = new TopologicalSort(graph);
s.Search();
var answer = string.Join(" ", s.Order.Select(GetSource));
return(new[] { answer });
}
public static IEnumerable <int> StronglyConnectedComponents(AdjacencyListGraph <long> graph, AdjacencyListGraph <long> reverse)
{
//run dfs of reverse graph
var srg = new TopologicalSort(reverse);
srg.Search();
//look for v in graph in reverse post order
var sg = new DepthFirstSearchWithComponents(graph);
var order = srg.Order;
foreach (var v in order)
{
//if not visited => explore and mark visted vertices as new component
sg.Explore(v);
}
return(sg.Components);
}