private NailNumber CheckSplit(ref bool split)
{
if (IsNumber)
{
if (_value > 9)
{
var node = new NailNumber(new NailNumber(_value / 2), new NailNumber((_value + 1) / 2));
node._left.SetPrevious(_previous);
_previous?.SetNext(node._left);
node._right.SetNext(_next);
_next?.SetPrevious(node._right);
split = true;
return(node);
}
}
else
{
_left = _left.CheckSplit(ref split);
if (split)
{
return(this);
}
_right = _right.CheckSplit(ref split);
}
return(this);
}
public NailNumber Add(NailNumber a)
{
var result = new NailNumber(new NailNumber(this), new NailNumber(a));
bool redo;
do
{
redo = false;
result.CheckExplode(ref redo);
if (!redo)
{
result.CheckSplit(ref redo);
}
} while (redo);
return(result);
}