Cod sursa(job #1541660)

Utilizator irinaandrasAndras Maria-Irina irinaandras Data 4 decembrie 2015 14:42:02
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.3 kb
Raporteaza aceasta sursa 
#include <fstream>

using namespace std;
ifstream in("ciur.in");
ofstream out("ciur.out");
bool v[2000001];
int gg;
int main()
{int N,i,j;
in>>N;
 for(i=2;i<=N;i++)
{
    if(v[i]==0)

    {
        gg++;
        for(j=i*2;j<=N;j=j+i)
            v[j]=1;}
    }
out<<gg;

    return 0;
}