using System;
using System.Collections.Generic;
using System.Linq;

namespace EratosthenesCS
{
    class Program
    {
        readonly static int N = 5000000;

        static List<int> SieveOfEratosthenes(int n)
        {
            bool[] isPrime = Enumerable.Repeat(true, n).ToArray();
            var primes = new List<int>();
            isPrime[0] = isPrime[1] = false;
            for (int i = 2; i < n; i++)
            {
                if (isPrime[i])
                {
                    primes.Add(i);
                    for (int j = 2 * i; j < n; j += i)
                    {
                        isPrime[j] = false;
                    }
                }
            }
            return primes;
        }

        static void Main(string[] args)
        {
            var _ = SieveOfEratosthenes(N);
            Console.WriteLine(0);
        }
    }
}