Loops - Homework - Problem 18

//// Loops - Homework - Problem 18
namespace Pr_18_HW
{
    using System;
    public class MainClass
    {
        public static void Main()
        {
            int n = int.Parse(Console.ReadLine());
            int maxDifference = 0;

            var lastCouple = int.Parse(Console.ReadLine()) +
                int.Parse(Console.ReadLine());

            for (int i = 1; i < n; i++)
            {
                var currentCouple = int.Parse(Console.ReadLine()) +
                    int.Parse(Console.ReadLine());
                var diffence = currentCouple - lastCouple;
                var currentDifference = Math.Abs(diffence);
                if (currentDifference > maxDifference)
                {
                    maxDifference = currentDifference;
                }

                lastCouple = currentCouple;
            }

            if (maxDifference > 0)
            {
                Console.WriteLine("No, maxdiff={0}", maxDifference);
            }
            else
            {
                Console.WriteLine($"Yes, value={lastCouple}");
            }
        }
    }
}

//// Basic Exam 17.07 - Problem 5 - Diamond
namespace Pr05_Diamond_17_Jul
{
    using System;

    public class MainClass
    {
        public static void Main()
        {
            int n = int.Parse(Console.ReadLine());
            string topRow = new string('.', n) + new string('*', 3*n) + new string('.', n);
            Console.WriteLine(topRow);
            ////
            for (int i = 0; i < n - 1; i++)
            {
                var outerDots = new string('.', n - 1 - i);
                var innerDots = new string('.', 3*n + i*2);
                var upperRow = outerDots + "*" + innerDots + "*" + outerDots;
                Console.WriteLine(upperRow);
            }
            ////
            string middleRow = new string('*', 5*n);
            Console.WriteLine(middleRow);
            ////
            for (int i = 0; i < 2*n; i++)
            {
                var outerDots = new string('.', 1 + i);
                var innerDots = new string('.', 5*n - 4 - 2*i);
                var lowerRow = outerDots + "*" + innerDots + "*" + outerDots;
                Console.WriteLine(lowerRow);
            }
            ////
            string bottomRow = new string('.', 2*n + 1) + new string('*', n - 2) + new string('.', 2 * n + 1);
            Console.WriteLine(bottomRow);
        }
    }
}