SieveOfErathosthenes

using System;
using System.Collections.Generic;

namespace SieveOfEratosthenes
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            List<int> sequnceOfPrimeNumbers = new List<int>();
            var isPrime = false;
            for (int i = 2; i <= n; i++)
            {
                isPrime = CheckForPrimeNumberInSequence(i);
                if (isPrime)
                {
                    sequnceOfPrimeNumbers.Add(i);
                }
            }
            Console.WriteLine(string.Join(" ", sequnceOfPrimeNumbers));
        }
        private static bool CheckForPrimeNumberInSequence(int n)
        {
            bool isPrime = true;
            for (int i = 2; i <= Math.Sqrt(n); i++)
            {
                if (n % i == 0)
                {
                    isPrime = false;
                    break;
                }
            }
            return isPrime;
        }
    }
}