Cod sursa(job #1677256)

Utilizator alexdaduBucurica Alexandru alexdadu Data 6 aprilie 2016 14:07:13
Problema Ciurul lui Eratosthenes Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.45 kb
#include <iostream>
#include <fstream>

using namespace std;
ifstream in ("ciur.in");
ofstream out ("ciur.out");

bool a[2000001];
int n,i,j;
int main()
{
    in>>n;
    for(i=2; i<=n; i++)
        a[i]=true;

    for(i=2; i<=n; i++)
    {
        if(a[i]==true)
        {
            for(j=2*i; j<=n; j+=i)
                a[j]=false;
        }
    }

    for(i=2; i<=n; i++)
        if(a[i]==true) out<<i<<" ";
    return 0;
}