using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Runtime.CompilerServices;

namespace PV178
{
    class Person
    {
        public int Age { get; set; }

        public string Name { get; set; }
    }

    class Program
    {
        private const int SENIORAGE = 60;
        static void Main(string[] args)
        {
            int[] j = {2,4,6,8,10,11};
            int k = 3;

            Program p = new Program();
            
            System.Console.WriteLine(p.SelectElement(j,k));

            List<Person> people = new List<Person>();
            Person pe = new Person();
            pe.Age = 100;
            pe.Name = "Josef Stolety";
            people.Add(pe);

            pe = new Person();
            pe.Age = 80;
            pe.Name = "Jan Osmdesatnik";
            people.Add(pe);

            pe = new Person();
            pe.Age = 20;
            pe.Name = "Jiri Mlady";
            people.Add(pe);

            Console.WriteLine(people.Count());
            Console.WriteLine(p.SeniorNames(people).Count());
            Console.ReadKey();
        }

        [MethodImpl(MethodImplOptions.Synchronized)]
        public int[] OddElements(int[] elements)
        {
            return (int[]) elements.Where(x => x % 2 == 1);
        }

        private IEnumerable<string> SeniorNames(IEnumerable<Person> people)
        {
            var query = from p in people where p.Age > SENIORAGE select p.Name;
            return query;
        }
        
        public unsafe int SelectElement(int[] array, int offset)
        {
            fixed (int *ptr = array)
            {
                return *(ptr + offset);
            }
        }
    }
}