Cod sursa(job #679515)

Utilizator ericqwAndreica Eric ericqw Data 13 februarie 2012 13:25:10
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.31 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
long long i,n,j,c;
bool v[2000002];
int main()
{
ifstream fin("ciur.in");
ofstream fout("ciur.out");	
fin>>n;
for (i=2;i<=n;i++)
	v[i]=1;
for (i=2;i<=n;i++)
	 if (v[i]==1)
		 {
		   c++;
		   for(j=i+i;j<=n;j=j+i)
			   v[j]=0;
	     }
fout<<c;
return 0;
}