// Time class, representing time as hours and minutes since midnight

class Time {
  int hours, min;       // since midnight
  
  Time(int hours, int min) 
  { this.hours = hours; this.min = min; }

  public String toString() 
  { return hours + "." + min; }

  Time plus(int min) { 
    int totalmin = 60 * this.hours + this.min + min;
    return new Time(totalmin / 60, totalmin % 60); 
  }

  int to(Time t) 
  { return 60 * t.hours + t.min - 60 * hours - min; }

  boolean before(Time t) 
  { return hours < t.hours || hours == t.hours && min <= t.min; }
}

// Test the Time class

public class Time2 {

  public static void main(String[] args) {
    Time t1, t2;
    t1 = new Time(12, 35); 
    t2 = t1.plus(40);

    System.out.println("t1 er " + t1);
    System.out.println("t2 er " + t2);
    System.out.println("t1 før t2 er " + t1.before(t2));
    System.out.println("fra t1 til t2 er der " + t1.to(t2) + " minutter");
    System.out.println("t1 er stadig " + t1);
  }
}