using System;           

public class Program

{

    public static void Main()

    {

    int child1, child2, mother, father, sum, main;

    Console.Write ("Enter child1: "); 

    child1 = int. Parse (Console.ReadLine ());

    Console.Write ("Enter child2: "); 

    child2 = int. Parse (Console.ReadLine ());

    Console.Write ("Enter mother:");

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

    Console.Write ("Enter father:");

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

    sum = (child1 + child2 + mother  + father);

    main = (sum/4);

    Console.WriteLine (" the sum is {0} the  main is: {1}  " , sum, main );

    }

}