Cod sursa(job #662237)

Utilizator tmyo1000albu razvan tmyo1000 Data 16 ianuarie 2012 10:40:41
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.3 kb
Raporteaza aceasta sursa 
#include<fstream>
 using namespace std; 
int main()
{
ifstream f("ciur.in");
ofstream g("ciur.out");
char v[2000001];
int n,i,j,c;
f>>n;
c=0;
for(i=1;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;
}
g<<c;
f.close();
g.close();
return 0;
}