public WeightedUnionFindNode()
{
_height = 0;
_groupSize = 1;
_parent = this;
Weight = 0;
}
public bool Unite(WeightedUnionFindNode other, long weight)
{
weight += Weight;
weight -= other.Weight;
var thisRoot = this.FindRoot();
var otherRoot = other.FindRoot();
if (thisRoot == otherRoot)
{
return(false);
}
if (thisRoot._height < otherRoot._height)
{
thisRoot._parent = otherRoot;
otherRoot._groupSize += thisRoot._groupSize;
otherRoot._height = Math.Max(thisRoot._height + 1, otherRoot._height);
thisRoot.Weight = -weight;
return(true);
}
else
{
otherRoot._parent = thisRoot;
thisRoot._groupSize += otherRoot._groupSize;
thisRoot._height = Math.Max(otherRoot._height + 1, thisRoot._height);
otherRoot.Weight = +weight;
return(true);
}
}
public WeightedUnionFindNode FindRoot()
{
if (_parent != this) // not ref equals
{
var root = _parent.FindRoot();
_weight += _parent._weight;
_parent = root;
}
return(_parent);
}
public bool IsInSameGroup(WeightedUnionFindNode other) => this.FindRoot() == other.FindRoot();
