//Zadanie 3
        static void exchangeMinMax(int[] tablica)
        {
            int indexMax = 0;
            int max = tablica[0];
            int indexMin = 0;
            int min = tablica[0];
            for (int i = 1; i < tablica.Length; i++)
                if (tablica[i] > max)
                {
                    max = tablica[i];
                    indexMax = i;
                }

            for (int i = 1; i < tablica.Length; i++)
                if (tablica[i] < min)
                {
                    min = tablica[i];
                    indexMin = i;
                }
            int wartosc = tablica[indexMax];
            tablica[indexMax] = tablica[indexMin];
            tablica[indexMin] = wartosc;



            Console.WriteLine("max: {0} i indeks = {1}", max, indexMax);
            Console.WriteLine("min: {0} i indeks = {1}", min, indexMin);

            foreach (int i in tablica)
            {
                Console.Write(" {0}", i);
            }
        }