using System;

public class Program

{

    public static void Main()

    {

        //Ivan Edwin Solorzano Solorzano

        //Jeshua Hernandez Carranza

        int a =0;

    Console.WriteLine("introduce  a number");

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

    if (b<a){

    Console.WriteLine("The number is negative");

    }   

    else{

    Console.WriteLine(" the number is positive");

    }

    //parte 2

        Console.WriteLine("introduce your level");

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

        if(level==1){ 

        Console.WriteLine("Access garanted your level is basic level");

        }

        else if(level==2)

        {

        Console.WriteLine("Access garanted your level is intermediate level");

        }

        else if(level==3){

        Console.WriteLine("Access garanted your level is advanced level");

        }

        else{

        Console.WriteLine("Access denied your level is not the necessary"); 

        }

        //act3 par o impar

        Console.WriteLine("introduce a number");

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

        if(num%2==0){

            Console.WriteLine("your number is par");

        }

        else {

        Console.WriteLine("your number is impar");

        }

        Console.WriteLine("How many pens do you want to buy?");

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

        if (pens>=1000){

        double precio= pens * 8.50;

            Console.WriteLine($"your price is:{precio}");

        }

        else{

         double prices = pens*9;

            Console.WriteLine($"your price is:{prices}");

        }

        // act5

        Console.WriteLine("introduce the price of your clothes");

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

        if(clothes>=2500) 

        {

            Console.WriteLine($"your price is:{clothes-(clothes*0.15)}");

        }

        else

        {

        Console.WriteLine($"your price is:{clothes-(clothes*0.08)}");   

        }

        // act 6

        Console.WriteLine("introduce a sentence");

        string sentence=Console.ReadLine();

        Console.WriteLine("introduce a word");

        string word=Console.ReadLine();

        if(sentence.Contains(word)){

            Console.WriteLine($"{sentence} countain  {word}");  

        }

        else

        {

            Console.WriteLine($"{sentence} not countain  {word}");  

        }

        //act 7

        Console.WriteLine("introduce a word");

        string w1=Console.ReadLine();

        Console.WriteLine("introduce a word");

        string w2=Console.ReadLine();

        w1= w1.ToUpper();

        w2= w2.ToUpper();

    if(w1==w2){

        Console.WriteLine($"the words {w1} and {w2} are the same");

    }

        else {

            Console.WriteLine($"the words {w1} and {w2}  are not the same");

        }

    }

    }

​