Cod sursa(job #906034)

Utilizator GainusaHij Lucian Gainusa Data 6 martie 2013 13:48:03
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.3 kb
Raporteaza aceasta sursa 
#include<iostream>
#include<fstream>
using namespace std;
ifstream f("ciur.in");
ofstream g("ciur.out");
char v[2000002];
int n,i,j;

int main ()
{
	int nr=0;
	f>>n;
	for(i=2;i<=n;i++) 
	{
		if(v[i]==0)
		{
			nr++;
			v[i]=1;
			
			for(j=i;j<=n;j=j+i)
			v[j]=1;
		}
		
	}
	g<<nr;
}