using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            double i, j,a;
            double display=0;
            Console.WriteLine("enter the number:");
            double n = double.Parse(Console.ReadLine());

            try
            {

                for (i = 1; i <= n; i++)
                {
                    for (j = 1; j <= n; j++)
                    {
                        if ((i * j) == n)
                        {
                            a = double.Parse(string.Concat((object)i, (object)j));

                            if (i == 1)
                            {
                                if (n == 1)
                                    display = 1;
                                else
                                    display = a;
                            }
                            else
                            {
                                if (a < display)
                                {
                                    display = a;
                                }
                            }
                        }
                    }
                }

                Console.WriteLine(display);
            }
            catch (NotFiniteNumberException)
            {
                Console.WriteLine(-1);
            }
        }
    }
}

Edited by author 01.02.2011 15:27