using System;

public class Program

{

    public static void Main()

    {

        // + - * / % 運算式

        int a=13;

        int b=20;

        int c=30;

        Console.WriteLine(a/5);

        Console.WriteLine(a%5);

        //算數比較 > < == >= <=

        //&&(and) ||(or)

        //   true    ture     true

        if(a >= 13 && b < c && c > a){

            Console.WriteLine("成立");

        }

        else

        {

            Console.WriteLine("不成立");

        }

    }

}