Cod sursa(job #261818)

Utilizator cristina93nu vreau cristina93 Data 18 februarie 2009 19:43:51
Problema Ciurul lui Eratosthenes Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.32 kb
Raporteaza aceasta sursa 
#include<fstream.h>
#define NM 2000000


int main(){

char v[NM+1]={0};
int i,j,n,p=0;
ifstream fin("ciur.in");
ofstream fout("ciur.out");
fin>>n;
v[1]=1;
for(i=2;i<=n/2;i++)
if(v[i]==0)
	for(j=2;j*i<=n;j++)
	v[i*j]=1;
for(i=1;i<=n;i++)
if(v[i]==0) p++;
fout<<p;
return 0;
}                             m