using System;

public class Program

{

     public static bool canNumbersBeSideOfTriangle(double a, double b, double c)

     {

     bool check=false;

         if( a>0 && b>0 && c>0 && (a+b)>c && (a+c)>b && (b+c)>a)

         {

             check=true;

         }

     return check;

     }

    public static void Main()

    {

        Console.WriteLine("Enter first side");

        double first=double.Parse(Console.ReadLine());

        Console.WriteLine("Enter second side");

        double second=double.Parse(Console.ReadLine());

        Console.WriteLine("Enter third side");

        double third=double.Parse(Console.ReadLine());

        bool isTrue=canNumbersBeSideOfTriangle(first,second,third);

        if(isTrue==true)

        {

        Console.WriteLine("The numbers can be sides of triangle");

        }

        else

        {

        Console.WriteLine("The numbers can't be sides of triangle.Try again!");

        }

    }

}