import it.unimi.dsi.big.webgraph.labelling.ArcLabelledImmutableGraph;
import it.unimi.dsi.big.webgraph.labelling.ArcLabelledNodeIterator;
import it.unimi.dsi.big.webgraph.labelling.BitStreamArcLabelledImmutableGraph;
import it.unimi.dsi.fastutil.io.BinIO;

import java.io.*;

public class ReadLabelledGraph {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        String graphPath = args[0];

        ArcLabelledImmutableGraph graph = BitStreamArcLabelledImmutableGraph.loadOffline(graphPath + "-labelled");

        ArcLabelledNodeIterator it = graph.nodeIterator();
        while (it.hasNext()) {
            long srcNode = it.nextLong();

            ArcLabelledNodeIterator.LabelledArcIterator s = it.successors();
            long dstNode;
            while ((dstNode = s.nextLong()) >= 0) {
                int label = (int) s.label().get();
                int missing = (1 << s.label().fixedWidth()) - 1;
                if (label == missing)
                    label = -1;

                System.out.format(
                        "%d %d %d\n",
                        srcNode,
                        dstNode,
                        label)
                );
            }
        }
    }
}