using System;

public class Program

{

    public static void Main()

    {

        int A,B,C; 

        double TMP ;

        Console. WriteLine("insert firt number");

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

        Console. WriteLine("insert second number");

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

        Console. WriteLine("insert THIRD number");

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

        Console.WriteLine("AV={0}")  ;

    }