01. Data Types

using System;

namespace DataTypes
{
    class Program
    {
        static void Main(string[] args)
        {
            string dataTypes = Console.ReadLine();
            string input = Console.ReadLine();

            Console.WriteLine(PrintTypeResult(dataTypes, input));
        }

        static string PrintTypeResult(string dt, string i)
        {
            return
                dt == "string" ? $"${i}$" :
                dt == "int"? $"{int.Parse(i) * 2}" :
                $"{double.Parse(i) * 1.5:f2}";
        }
    }
}