import java.io.File;
import java.io.FileNotFoundException;
import java.util.HashMap;
import java.util.Scanner;
import java.util.concurrent.ThreadLocalRandom;

/**
 * Created by Sergi.
 * UPV 2016
 */
public class probabilidad {
    public static void main(String[] args) throws FileNotFoundException{
        HashMap<Integer, Integer> alumnos = new HashMap<>();
        int repeticiones = 1000;
        int totalAlumnos = 20;

        for (int i = 1; i <= totalAlumnos; i++) {
            alumnos.put(i, 0);
        }

        for (int r = 1; r <= repeticiones; r++) {
            int random = ThreadLocalRandom.current().nextInt(1, totalAlumnos + 1);
            int value = alumnos.get(random);
            alumnos.put(random, value + 1);
        }

        Scanner sc = new Scanner(new File("alumnos.txt"));
        for (Integer name: alumnos.keySet()){
            String key = name.toString();
            int value = alumnos.get(name);
            float total = (float)value/repeticiones*100;
            System.out.printf("%2s %-32s %s \t %2.02f\n",key, sc.nextLine(), value, total);
        }
        sc.close();

    }
}