Cod sursa(job #955736)

Utilizator radu33Nesiu Radu radu33 Data 1 iunie 2013 13:53:24
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.35 kb
Raporteaza aceasta sursa 
#include<fstream>
#define NMAX 20000000
#include<stdio.h>
#include<math.h>
using namespace std;
ifstream f("ciur.in");
ofstream g("ciur.out");
int n,v[NMAX],i,j,k;

int main()
{
	f>>n;
	for(i=2;i<=n;i++)
		v[i]=1;

	for(i=2;i<=n;i++)
  if(v[i]){k++;
     for(j=2*i;j<=n;j=j+i)
         v[j]=0; }
               
	
	g<<k;


return 0;
}