diff -r a99186a9b6b0 -r 371cf309fc3c lemon/pr_bipartite_matching.h
--- a/lemon/pr_bipartite_matching.h	Wed Nov 14 17:42:48 2007 +0000
+++ b/lemon/pr_bipartite_matching.h	Wed Nov 14 17:44:42 2007 +0000
@@ -179,7 +179,7 @@
 	}
 	if(nlevel<_node_num) {
 	  if(nlevel>=actlevel)
-	    _levels.liftHighestActiveTo(nlevel+1);
+	    _levels.liftHighestActive(nlevel+1);
 	  bact=_g.bNode(_matching[_g.aNode(bedge)]);
 	  if(--_cov[bact]<1) {
 	    _levels.activate(bact);
@@ -190,12 +190,10 @@
 	  _levels.deactivate(act);
 	}
 	else {
-	  if(_node_num>actlevel) 
-	    _levels.liftHighestActiveTo(_node_num);
-	  _levels.deactivate(act); 
+	  _levels.liftHighestActiveToTop();
 	}
 
-	if(_levels.onLevel(actlevel)==0)
+	if(_levels.emptyLevel(actlevel))
 	  _levels.liftToTop(actlevel);
       }
       
@@ -246,7 +244,7 @@
 	}
 	if(nlevel<_node_num) {
 	  if(nlevel>=actlevel)
-	    _levels.liftHighestActiveTo(nlevel+1);
+	    _levels.liftHighestActive(nlevel+1);
 	  bact=_g.bNode(_matching[_g.aNode(bedge)]);
 	  if(--_cov[bact]<1) {
 	    _levels.activate(bact);
@@ -257,12 +255,10 @@
 	  _levels.deactivate(act);
 	}
 	else {
-	  if(_node_num>actlevel) 
-	    _levels.liftHighestActiveTo(_node_num);
-	  _levels.deactivate(act); 
+	  _levels.liftHighestActiveToTop();
 	}
 
-	if(_levels.onLevel(actlevel)==0)
+	if(_levels.emptyLevel(actlevel))
 	  _empty_level=actlevel;
 	  return false;
       }