static int lagDuration(int h1, int m1, int h2, int m2, int k) {
        // Return an integer denoting the duration of time in minutes by which the clock has been lagging.
        int h = (h1*60) + (k*60)+m1;
        int wh = (h2*60)+m2;
        
        return Math.abs(h-wh);
    }