Cod sursa(job #1737625)

Utilizator dumitru123Patularu Mihai dumitru123 Data 4 august 2016 15:10:09
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.35 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std;
ifstream f("ciur.in");
ofstream g("ciur.out");
bool ciur[2000002];
long long i,j,n,k;
void eratosthenes()
{
    for(i=2;i<=n;i++)
    {
        if(ciur[i]==false) k++;
        for(j=2;j*i<=n;j++)
        ciur[i*j]=true;
    }
    g<<k;
}
int main()
{
    f>>n;
    eratosthenes();
    return 0;
}