#include <bits/stdc++.h>
using namespace std;

void cambiarBit(int A[], int k)
{
    int i = k/32;
    int pos = k%32;
    A[i] = A[i]-(pow(2, pos));
}

void criba(int n)
{
    ofstream primos("primos.txt");
    char prime[n+1];
    memset(prime, '1', sizeof(prime));

    for (int p=3; p*p<=n; p=p+2)
    {
        if (prime[p] == '1')
        {
            for (int i=p*2; i<=n; i += p)
                prime[i] = '0';
        }
    }

    for (int p=2; p<=n; p++)
       if (prime[p])
          primos << p << " ";
}


int main()
{

    int n;
    cin>>n;
    criba(n);
    return 0;
}