Method firstOut

ot/lp/full_bipartitegraph.h:109–114

    }

    void firstOut(Arc& arc, const Node& node) const {
		if (node>=_n1)
			arc = -1;
		else
			arc = (node + 1) * _n2 - 1;
    }

    void nextOut(Arc& arc) const {
      if (arc % _n2 == 0) arc = 0;