using System;
using System.Collections.Generic;

namespace console
{
    class Program
    {
        static void Main(string[] args)
        {
            WorkingWithStrings();
            Console.WriteLine(Fib(2000));
        }

        static int Fib(int count)
        {
            var nums = new List<int> {1, 1};
            int i = 3;
            while (i++ <= count) {
                var t = nums[nums.Count - 1];
                var p = nums[nums.Count - 2];
                nums.Add(t + p);
            }
            return nums[count - 1];
        }

        static void WorkingWithStrings ()
        {
            var names = new List<string>{"Li lei", "Han meimei", "David"};
            foreach (var name in names) {
                Console.WriteLine($"Hello {name}");
            }
        }
    }
}