using System;

public class Program

{

    //skriti poleta na klasa

    private int n1;

    private int n2;

    private char symbol;

    //public s vsickite poleta ot priveita koito  sa

    public int N1

    {

      get {return this.n1;}

      set {this.n1 = value;}

    }

    public int N2

    {

      get {return this.n2;}

      set {this.n2 = value;}

    }

    public char Symbol

    {

      get {return this.symbol;}

      set {this.symbol = value;}

    }

    //prazen konstruktor

    public Program()

        {

        this.n1=0;

        this.n2=0;

        }

    //metod za proverka kakvo deistvie shte se izvarshva

    piblic int Sum(int n1,int n2)   

    {

       if (symbol == '+')

       {

          var subirane=n1+n2;

          Console.WriteLine(subirane);

       }

        else if (symbol == '-')

       {

          var izvajdane=n1-n2;

          Console.WriteLine(izvajdane);

       }

        else if (symbol == '*')

       {

          var umnojenie=n1*n2;

          Console.WriteLine(umnojenie);

       }

        else if (symbol == '/')

       {

          var delenie=n1/n2;

          Console.WriteLine(delenie);

       }

       {

        if(n1==0)

        {

            Console.WriteLine("Cannot divide N1 by zero");

        }

        else if(n2==0)

        {

            Console.WriteLine("Cannot divide N2 by zero");

        }

        else

        {

            Console.WriteLine("{0}/{1}={2:f2}",n1,n2,n1/n2);

        }

       }

    }

​

    //main metoda

    public static void Main()

    {

        int n1 = int.Parse(Console.ReadLine());

        int n2 = int.Parse(Console.ReadLine());

        char symbol = char.Parse(Console.ReadLine());

    }

    }

​