Cod sursa(job #1322593)

Utilizator ADragos... ... ADragos Data 20 ianuarie 2015 10:18:41
Problema Ciurul lui Eratosthenes Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 0.33 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>
using namespace std;
int i,j,a[100],n,k=0;
int main (void)
{
    ifstream f("ciur.in");
    ofstream g("ciur.out");
    f>>n;
    for (i=2;i<=n;i++) a[i]=1;
    for (i=2;i*i<=n;i++)
        for (j=i;i*j<=n;j++) a[i*j]=0;
    for (i=1;i<=n;i++) if (a[i]==1) k++;
    g<<k;
    return 0;
}