Cod sursa(job #748979)

Utilizator bia.liliPoenar Liana bia.lili Data 15 mai 2012 15:07:50
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.32 kb
Raporteaza aceasta sursa 
# include <fstream>
using namespace std;
int main()
{
    int n,i,j,nr=0;
    char ciur[2000001];
    ifstream f("ciur.in");
    ofstream g("ciur.out");
f>>n;
     for(i=2;i<=n;i++)
     {if (ciur[i]==0)
     {nr++;
     for(j=i+i;j<=n;j=j+i)
     ciur[j]=1;
     }}
g<<nr;
f.close();
g.close();
return 0;}