public BFSPaths(Graph g, int s)
{
_marked = new bool[g.V];
_edgeTo = new int[g.V];
_s = s;
bfs(g, s);
}
public static int NumberOfSelfLoops(Graph g)
{
int count = 0;
g.V.Times(v => {
foreach (int w in g.Adjacent(v)) {
if (v == w) count++;
}
});
return count / 2;
}
public static int MaxDegree(Graph g)
{
int max = 0;
g.V.Times(v => {
if (Degree(g, v) > max) {
max = Degree(g, v);
}
});
return max;
}
private void dfs(Graph g, int v)
{
_marked[v] = true;
foreach (var adj in g.Adjacent(v)) {
if (!_marked[adj]) {
_edgeTo[adj] = v;
dfs(g, adj);
}
}
}
private void bfs(Graph g, int s)
{
var queue = new Queue<int>();
_marked[s] = true;
queue.Enqueue(s);
while(queue.Count>0) {
int v = queue.Dequeue();
foreach(int w in g.Adjacent(v)) {
if(!_marked[w]) {
_edgeTo[w] = v;
_marked[w] = true;
queue.Enqueue(w);
}
}
}
}
static void Main(string[] args)
{
Graph g = new Graph(9);
g.AddEdge(0, 1);
g.AddEdge(0, 3);
g.AddEdge(1, 2);
g.AddEdge(1, 4);
g.AddEdge(2, 5);
g.AddEdge(3, 4);
g.AddEdge(3, 6);
g.AddEdge(4, 5);
g.AddEdge(4, 7);
g.AddEdge(5, 8);
g.AddEdge(6, 7);
g.AddEdge(7, 8);
var p = new BFSPaths(g, 0);
p.PathTo(8);
}
public static int Degree(Graph g, int v)
{
return g.Adjacent(v).Count();
}
public static int AverageDegree(Graph g)
{
return 2 * g.E / g.V;
}