using System;

​

public class Program

{

    interface IVisitor

    {

        public void VisitOne(One one);

        public void VisitTwo(Two two);

    }

    interface IVisitable<T>

    {

        public T Accept(IVisitor visitor);

    }

    class One : IVisitable<int>, IVisitable<string>

    {

        int IVisitable<int>.Accept(IVisitor visitor)

        {

            return 1;

        }

        string IVisitable<string>.Accept(IVisitor visitor)

        {

            return "Jedna";

        }

    }

    class Two : IVisitable<int>, IVisitable<string>

    {

        int IVisitable<int>.Accept(IVisitor visitor)

        {

            return 2;

        }

        string IVisitable<string>.Accept(IVisitor visitor)

        {

            return "Dva";

        }

    }

    class Visitor : IVisitor

    {

        public void VisitOne(One one)

        {

            int i = (one as IVisitable<int>).Accept(this);

            string s = (one as IVisitable<string>).Accept(this);

            Console.WriteLine($"Int: {i.ToString()}, String: {s}");

        }

        public void VisitTwo(Two two)

        {

            int i = (two as IVisitable<int>).Accept(this);

            string s = (two as IVisitable<string>).Accept(this);

            Console.WriteLine($"Int: {i.ToString()}, String: {s}");

        }

    }

    public static void Main()

    {

        Visitor v = new();

        One one = new();

        Two two = new();

        v.VisitOne(one);

        v.VisitTwo(two);

    }

}