public Graph BuildSpanningTree()
{
SortedList <object, int> subTrees = new SortedList <object, int>();
var temp = GetNodeNames();
//построение дерева,где каждая компонент связонности находится в разных поддеревьях(0-6)
for (int i = 0; i < temp.Count; i++)
{
subTrees.Add(temp[i], i);
}
Graph SpanningTree = new Graph();
if (!IsDirected)
{
SpanningTree.ConvertToDirected();
}
//пока
while (!CheckNumber(subTrees))
{
foreach (var node in Graf)
{
KeyValuePair <object, int> joint;
try
{
joint = node.Value.ToArray().OrderBy(x => x.Value).First();
}
catch
{
continue;
}
try { SpanningTree.AddVertex(node.Key); }
catch { }
try { SpanningTree.AddVertex(joint.Key); }
catch { }
try { SpanningTree.AddJoint(node.Key, joint.Key, joint.Value); }
catch { }
DeleteVertex(node.Key, joint.Key);
if (subTrees[joint.Key] > subTrees[node.Key])
{
int t = subTrees[joint.Key];
foreach (object n in GetNodeNames())
{
if (subTrees[n] == t)
{
subTrees[n] = subTrees[node.Key];
}
}
}
else
{
int t = subTrees[node.Key];
foreach (object n in GetNodeNames())
{
if (subTrees[n] == t)
{
subTrees[n] = subTrees[joint.Key];
}
}
}
}
}
return(SpanningTree);
}
/*ниже методы для курсовой мне нужны*/
public Graph Hungarian(out int cost)
{
SortedList <int, object> references;
int[,] a = GetMas(out references);
int n = Graf.Count;
int[] u = new int[n + 1];
int[] v = new int[n + 1];
int[] p = new int[n + 1];
int[] way = new int[n + 1];
for (int i = 1; i <= n; i++)
{
p[0] = i;
int j0 = 0;
bool[] used = new bool[n + 1];
int[] minv = new int[n + 1];
for (int j = 0; j <= n; j++)
{
minv[j] = int.MaxValue;
used[j] = false;
}
do
{
used[j0] = true;
int i0 = p[j0];
int delta = int.MaxValue;
int j1 = 0;
for (int j = 1; j <= n; j++)
{
if (!used[j])
{
int cur = a[i0, j] - u[i0] - v[j];
if (cur < minv[j])
{
minv[j] = cur;
way[j] = j0;
}
if (minv[j] < delta)
{
delta = minv[j];
j1 = j;
}
}
}
for (int j = 0; j <= n; j++)
{
if (used[j])
{
u[p[j]] += delta;
v[j] -= delta;
}
else
{
minv[j] -= delta;
}
}
j0 = j1;
}while (p[j0] != 0);
do
{
int j1 = way[j0];
p[j0] = p[j1];
j0 = j1;
}while (j0 != 0);
}
int[] ans = new int[n + 1];
ans[0] = 0;
for (int j = 1; j <= n; j++)
{
ans[p[j]] = j;
}
cost = -v[0];
Graph ret = new Graph();
foreach (var node in references.Values)
{
ret.AddVertex(node);
}
for (int i = 1; i <= n; i++)
{
try { ret.AddJoint(references[i - 1], references[ans[i] - 1], 1); }
catch { }
}
if (!IsDirected)
{
ret.ConvertToUndirected();
}
return(ret);
}