Cod sursa(job #422372)

Utilizator bam67Blidar Adrian Marian bam67 Data 22 martie 2010 16:29:49
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.24 kb
Raporteaza aceasta sursa 
#include<fstream.h>
int a[1000009],i,k=1,j,n;
int main()
{ifstream f("ciur.in"); ofstream g("ciur.out");f>>n;
for(i=1;i<=n;i=i+2)
a[i]=i;



for(i=2;i<=n;i++)
if(a[i]!=0)
{k++;
for(j=i+a[i];j<=n;j=j+a[i])
a[j]=0;}
g<<k;
return 0;}