ZeroSubset

using System;

class ZeroSubset
{
    static void Main()
    {
        Console.WriteLine("Enter 5 integer numbers on оne line, separated by space.");
        Console.Write("The five numbers is ");
        try
        {
            string fiveNumbers = Console.ReadLine();
            string[] splitFiveNum = fiveNumbers.Split(' ');

            int firstNum = 0;
            int secondNum = 0;
            int thirdNum = 0;
            int fourthNum = 0;
            int fifthNum = 0;

            int a = int.Parse(splitFiveNum[0]);
            int b = int.Parse(splitFiveNum[1]);
            int c = int.Parse(splitFiveNum[2]);
            int d = int.Parse(splitFiveNum[3]);
            int e = int.Parse(splitFiveNum[4]);

            firstNum = a;
            secondNum = b;
            thirdNum = c;
            fourthNum = d;
            fifthNum = e;

            Console.WriteLine();
            Console.WriteLine("First number is {0}.", firstNum);
            Console.WriteLine("Second number is {0}.", secondNum);
            Console.WriteLine("Third number is {0}.", thirdNum);
            Console.WriteLine("Fourth number is {0}.", fourthNum);
            Console.WriteLine("Fifth number is {0}.", fifthNum);
            Console.WriteLine();

            bool checkTwoNum = (firstNum + secondNum == 0) || (firstNum + thirdNum == 0) || (firstNum + fourthNum == 0) ||
            (firstNum + fifthNum == 0) || (secondNum + thirdNum == 0) || (secondNum + fourthNum == 0) ||
            (secondNum + fifthNum == 0) || (thirdNum + fourthNum == 0) || (thirdNum + fifthNum == 0) ||
            (fourthNum + fifthNum == 0);

            bool checkThreeNum = (firstNum + secondNum + thirdNum == 0) || (firstNum + secondNum + fourthNum == 0) ||
            (firstNum + secondNum + fifthNum == 0) || (firstNum + thirdNum + fourthNum == 0) ||
            (firstNum + thirdNum + fifthNum == 0) || (firstNum + fourthNum + fifthNum == 0) ||
            (secondNum + thirdNum + fourthNum == 0) || (secondNum + thirdNum + fifthNum == 0) ||
            (secondNum + fourthNum + fifthNum == 0) || (thirdNum + fourthNum + fifthNum == 0);

            bool checkFourNum = (firstNum + secondNum + thirdNum + fourthNum == 0) ||
            (firstNum + secondNum + thirdNum + fifthNum == 0) || (firstNum + thirdNum + fourthNum + fifthNum == 0) ||
            (firstNum + secondNum + fourthNum + fifthNum == 0) || (secondNum + thirdNum + fourthNum + fifthNum == 0);

            bool checkFiveNum = (firstNum + secondNum + thirdNum + fourthNum + fifthNum == 0);
            if (checkTwoNum || checkThreeNum || checkFourNum || checkFiveNum)
            {
                Console.WriteLine("Have zero subset!");
            }
            else
            {
                Console.WriteLine("No zero subset..");
            }
        }
        catch
        {
            Console.WriteLine();
            Console.WriteLine("One or more than one of your integer numbers аre misspelled");
            Console.WriteLine("Or");
            Console.WriteLine("You write things other than integer numbers..");
            Console.WriteLine();
            Console.WriteLine("Try again and be careful!");

        }
        Console.ReadLine();
    }
}