3.4

using System;

namespace HelloApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Random number = new Random();
            int[] array = new int[30];

            for (int i = 0; i < 30; i++)
            {
                array[i] = number.Next(1, 100);
            }

            for (int i = 0; i < 30; i++)
            {
                switch (i)
                {
                    case 0:
                        if (array[i] > array[i + 1])
                        {
                            Console.ForegroundColor = ConsoleColor.Red;
                            Console.Write(array[i] + " ");
                            Console.ForegroundColor = ConsoleColor.White;
                        }
                        else
                        {
                            Console.Write(array[i] + " ");
                        }
                        break;
                    default:
                        if (array[i] > array[i + 1] && array[i] > array[i - 1])
                        {
                            Console.ForegroundColor = ConsoleColor.Red;
                            Console.Write(array[i] + " ");
                            Console.ForegroundColor = ConsoleColor.White;
                        }
                        else
                        {
                            Console.Write(array[i] + " ");
                        }
                        break;
                    case 29:
                        if (array[i] > array[i - 1])
                        {
                            Console.ForegroundColor = ConsoleColor.Red;
                            Console.Write(array[i] + " ");
                            Console.ForegroundColor = ConsoleColor.White;
                        }
                        else
                        {
                            Console.Write(array[i] + " ");
                        }
                        break;
                }
            }
            Console.WriteLine();
        }
    }
}