using System;

public class Program

{

    public static void Main()

    {

        int g=0, m=0;

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

        {

            Console.WriteLine("How many students are in the class?");

            int nump=int.Parse(Console.ReadLine());

              for (int k=1;k<=nump;k++)

              {

                  Console.WriteLine("How much money have you donated?");

                  int monp=int.Parse(Console.ReadLine());

                  g=g+monp;

                  m=m+g;

              }

            Console.WriteLine("the class donated"+" "+g);

            g=0;

        }

          Console.WriteLine("the total donation is"+" "+m);

    }

}