public UnionFindNode(T item)
{
_height = 0;
_groupSize = 1;
_parent = this;
Item = item;
}
private UnionFindNode <T> FindRoot()
{
if (_parent != this) // not ref equals
{
var root = _parent.FindRoot();
_parent = root;
}
return(_parent);
}
public void Unite(UnionFindNode <T> other)
{
var thisRoot = this.FindRoot();
var otherRoot = other.FindRoot();
if (thisRoot == otherRoot)
{
return;
}
if (thisRoot._height < otherRoot._height)
{
thisRoot._parent = otherRoot;
otherRoot._groupSize += thisRoot._groupSize;
otherRoot._height = Math.Max(thisRoot._height + 1, otherRoot._height);
}
else
{
otherRoot._parent = thisRoot;
thisRoot._groupSize += otherRoot._groupSize;
thisRoot._height = Math.Max(otherRoot._height + 1, thisRoot._height);
}
}
public bool IsInSameGroup(UnionFindNode <T> other) => this.FindRoot() == other.FindRoot();