1.1 --- a/src/hugo/dimacs.h	Tue Aug 31 17:54:22 2004 +0000
     1.2 +++ b/src/hugo/dimacs.h	Tue Aug 31 17:59:33 2004 +0000
     1.3 @@ -172,16 +172,14 @@
     1.4      os << "c matching problem" << std::endl;
     1.5  
     1.6      int i=1;
     1.7 -    NodeIt v;
     1.8 -    for(g.first(v); g.valid(v); g.next(v)) {
     1.9 +    for(NodeIt v(g); v!=INVALID; ++v) {
    1.10        nodes.set(v, i);
    1.11        ++i;
    1.12      }    
    1.13      
    1.14      os << "p mat " << g.nodeNum() << " " << g.edgeNum() << std::endl;
    1.15  
    1.16 -    EdgeIt e;
    1.17 -    for(g.first(e); g.valid(e); g.next(e)) {
    1.18 +    for(EdgeIt e(g); e!=INVALID; ++e) {
    1.19        os << "a " << nodes[g.tail(e)] << " " << nodes[g.head(e)] << std::endl; 
    1.20      }
    1.21