05. Salary

using System;

namespace Salary
{
    class Program
    {
        static void Main(string[] args)
        {
            int tabs = int.Parse(Console.ReadLine());
            int salary = int.Parse(Console.ReadLine());

            for (int i = 0; i < tabs && salary > 0; i++)
            {
                string apps = Console.ReadLine();

                if (apps == "Facebook")
                {
                    salary -= 150;
                }
                if (apps == "Instagram")
                {
                    salary -= 100;
                }
                if (apps == "Reddit")
                {
                    salary -= 50;
                }
            }

            if (salary > 0)
            {
                Console.WriteLine(salary);
            }
            else
            {
                Console.WriteLine("You have lost your salary.");
            }
        }
    }
}

Решение с for и тернарен оператор:

using System;

namespace Salary
{
    class Program
    {
        static void Main(string[] args)
        {
            int tabs = int.Parse(Console.ReadLine());
            int salary = int.Parse(Console.ReadLine());

            for (int i = 0; i < tabs && salary > 0; i++)
            {
                string apps = Console.ReadLine();
                salary -= apps == "Facebook" ? 150 : apps == "Instagram" ? 100 : apps == "Reddit" ? 50 : 0;
            }

            Console.WriteLine(salary > 0 ? $"{salary}" : "You have lost your salary.");
        }
    }
}

Решение с while:

using System;

namespace Salary
{
    class Program
    {
        static void Main(string[] args)
        {
            int tabs = int.Parse(Console.ReadLine());
            int salary = int.Parse(Console.ReadLine());

            while ( tabs != 0 && salary > 0)
            {
                string apps = Console.ReadLine();

                if (apps == "Facebook")
                {
                    salary -= 150;
                }
                if (apps == "Instagram")
                {
                    salary -= 100;
                }
                if (apps == "Reddit")
                {
                    salary -= 50;
                }
                tabs--;
            }

            if (salary > 0)
            {
                Console.WriteLine(salary);
            }
            else
            {
                Console.WriteLine("You have lost your salary.");
            }
        }
    }
}

Решение с while  и тернарен оператор:

using System;

namespace Salary
{
    class Program
    {
        static void Main(string[] args)
        {
            int tabs = int.Parse(Console.ReadLine());
            int salary = int.Parse(Console.ReadLine());

            while (tabs != 0 && salary > 0)
            {
                string apps = Console.ReadLine();
                salary -= apps == "Facebook" ? 150 : apps == "Instagram" ? 100 : apps == "Reddit" ? 50 : 0;
                tabs--;
            }

            Console.WriteLine(salary > 0 ? $"{salary}" : "You have lost your salary.");
        }
    }
}