using System;

public class Program

{

    public static void Main()

    {

        //Write a C# Sharp program to check whether a triangle is

        //Equilateral, Isosceles or Scalene.

        Console.Write("\tWhich tipe of triangle is it?\n");

        Console.Write("Input side 1 of triangle: ");

        int l1 = Convert.ToInt32(Console.ReadLine());

        Console.Write("Input side 2 of triangle: ");

        int l2 = Convert.ToInt32(Console.ReadLine()); 

        Console.Write("Input side 3 of triangle: ");

        int l3 = Convert.ToInt32(Console.ReadLine());  

        if(l1 == l2 && l2 == l3){  

        Console.Write("\nThis is an equilateral triangle");  

        } else if(l1 == l2 || l1 == l3 || l2 == l3){  

        Console.Write("\nThis is an isosceles triangle");  

        }else{  

        Console.Write("\nThis is a scalene triangle");  

        }  

        Console.Write("\nLiliana Elizalde Reyes"); 

    }

}