using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Input temp= ");

        int temp = int.Parse(Console.ReadLine());

        if (temp < 0)

        {

            Console.WriteLine("The temperature is negative!");

        }

​

        if (temp >= 0 && temp <= 25)

        {

            Console.WriteLine("The temperature is perfect!");

        }

​

        if (temp >= 26)

        {

            Console.WriteLine("The temperature is too high!");

        }

    }

}