using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _2015_C_sharp_Exam
{
    class Program
    {
        static void Main(string[] args)
        {
            //Question 2 - a

            int[] arr = { 12, 6, 13, 4, 9, 5 };

            int DivByThree = 0;
            for (int i = 0; i < arr.Length; i++)
            {
                if (arr[i] % 3 == 0)
                {
                    DivByThree++;
                }
            }

            Console.WriteLine("Numbers divisible by 3 = " + DivByThree);

            int maxNum = arr[0];
            for (int i = 1; i < arr.Length; i++)
            {
                if (arr[i] > maxNum)
                {
                    maxNum = arr[i];
                }
            }

            Console.WriteLine("Maximum number = " + maxNum);

            //swapping first and last element.
            int temp = arr[0];
            arr[0] = arr[5];
            arr[5] = temp;

            Console.Write("First and last element after swaping : " + arr[0] + " " + arr[5] + "\n");
        }
    }
}