using System;

public class Program

{

int i , sum=0 , min;

for ( i = 1; i <= 30 ;i++ )

    {

Console.WriteLine("vared kon zaman motalee roze" + i);

min = int. parse (Console.ReadLine() );

sum = sum + min ;

    } 

Cosole.WriteLine("you studied for {0} hour mount" , sum/60);

Console.Readkey();

}