using System;

​

class Represent

{

    public void repr(object obj)

    {

        Console.WriteLine(obj.ToString());

    }

}

​

class Ratonal

{

    int num;

    int denum;

    public Rational(int n, int d)

    {

        num = n;

        denum = d;

    }

​

    public override string ToString()

    {

        return num.ToString() + "/" + denum.ToString();

    }

​

    public Rational Add(Rational b)

    {

        Rational result = new Rational(0, 1);

        result.num = this.num * b.denum + this.denum * b.num;

        result.denum = this.denum * b.denum;

        return result;

    }

}

​

public class Program

{

    public static void Main(string[] args)

    {

        int a = 5;

        Rational b = new Rational(2, 3);

        Represent r = new Represent();

        r.repr(a);

        r.repr(b);

    }

}