Cod sursa(job #669004)
| Utilizator |  Elena Eli elielisor |
Data | 25 ianuarie 2012 22:33:49 |
|---|---|---|---|
| Problema | Ciurul lui Eratosthenes | Scor | 0 |
| Compilator | cpp | Status | done |
| Runda | Arhiva educationala | Marime | 0.23 kb |
#include<fstream>
using namespace std;
char a[2000000];
int i,j,n;
int main()
{
ifstream f("ciur.in");
ofstream g("ciur.out");
f>>n;
int nr;
for(i=2;i<=n;i++)
if(a[i]==0)
{
for(j=2;j<=n/i;j++)
a[i*j]=1;
nr++;
}
g<<nr;
}