Cod sursa(job #1734825)

Utilizator patcasrarespatcas rares danut patcasrares Data 28 iulie 2016 13:06:02
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.28 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
ifstream fin("ciur.in");
ofstream fout("ciur.out");

int main()
{
long long n,i,j,nr=0;
fin>>n;
int a[100001];
for(i=1;i<=n;i++)
    a[i]=0;
for(i=2;i<=n;i++)
if(!a[i]){nr++;
    for(j=2;j<=n/i;j++)
    a[i*j]=1;}
    fout<<nr;
}