Task1 07

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int min = 0;

            for (int i = 0; i < 3; i++)
            {
                string userInput = Console.ReadLine();
                string[] values = userInput.Split(' ');
                int currentMin = Convert.ToInt32(values[1]) - Convert.ToInt32(values[0]);

                if (currentMin < min || i == 0)
                {
                    min = currentMin;
                }

            }


            Console.WriteLine(min);
            Console.ReadKey();
        }
    }
}