// Khadiza Sultana
#include<iostream>
using namespace std;
int primecheck(int n){
    bool isprime = true;
    for(int i = 2; i * i <= n; i++){
        if(n % i == 0){
            isprime = false;
            return false;
        }
    }
    if(isprime)
       return true;
}
void printprime(int num){
    for(int i = 2; i <= num; i++){
        if(primecheck(i))
           cout << i << " ";
    }
}
int primecount(int num){
    int count = 0;
    for(int i = 2; i <= num; i++){
        if(primecheck(i))
           count++;
    }
    return count;
}
int main(){
    int num;
    cin >> num;
    printprime(num);
    cout << endl;
    cout << primecount(num) << endl;
    return 0;
}