sang nguyen to

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int a[10000009];
void sieve(){
    for(int i=0;i<10000009;i++){
        a[i]=1;
    }
    a[0]=a[1]=0;
    for(int i=2;i*i<10000009;i++){
        for(int j=i*i;j<10000009;j+=i){
            a[j]=0;
        }
    }
}

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */
    unsigned int n;
    cin>>n;
    sieve();
    for(int i=0;i<=n;i++){
        if(a[i]==1){
            cout<<i<<" ";
        }
    }
    return 0;
}