Helper.java

import java.io.*;
import java.util.HashMap;
import java.util.Map;


public class Helper {

    public static void main(String[] args) throws IOException{

        BufferedReader pr = new BufferedReader(new FileReader("path_to_the_final_prN.txt"));
        BufferedReader transition = new BufferedReader(new FileReader("path_to_transition.txt"));
        FileWriter fileWriter = new FileWriter("path_to_where_you_want_to_save_result.cvs");

        Map<String, String> page_pr = new HashMap<String, String>();

        String line = pr.readLine();
        while (line != null) {
            page_pr.put(line.split("\t")[0], line.split("\t")[1]);
            line = pr.readLine();
        }
        pr.close();

        line = transition.readLine();
        fileWriter.write("source,target,value\n");

        while (line != null) {

            String[] from_tos = line.split("\t");
            String[] tos = from_tos[1].split(",");
            for (String to: tos) {
                String value = page_pr.get(to);
                fileWriter.write(from_tos[0] + "," + to + "," + value + "\n");
            }
            line = transition.readLine();
        }

        transition.close();
        fileWriter.close();
    }
}