Cod sursa(job #664051)

Utilizator loredanacosteaCostea Loredana loredanacostea Data 19 ianuarie 2012 15:29:46
Problema Ciurul lui Eratosthenes Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 0.25 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
int n,i,j,nr,a[1000];
int main()
{
	ifstream f("ciur.in");
	ofstream g("ciur.out");
	f>>n;
	for(i=2;i<=n;i++)
		if(a[i]==0)
		{
			nr++;
			for(j=i+i;j<=n;j+=i)
				a[j]=1;
		}
		g<<nr;
		return 0;
}