using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("vuvedi kolko e dulug izpita v minuti");

        double k = double.Parse(Console.ReadLine());

        Console.WriteLine("vuvedi v kolko chasa zapochva testa");

        double h = double.Parse(Console.ReadLine());

        Console.WriteLine("vuvedi v kolko minuti zapochva testa");

        double m = double.Parse(Console.ReadLine());

        double c = k-Math.Floor(k/60)*60+m;

        h = Math.Floor(k/60)+h;  

        if(c>=60){

            h=h+1;

            c=c-60;

        }

        Console.WriteLine("testa svurshva v {0}.{1} chasa", h, c);  

        }   

    }

​