Cod sursa(job #1650591)

Utilizator BuggyxSosdian Bogdan Buggyx Data 11 martie 2016 19:14:44
Problema Ridicare la putere in timp logaritmic Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.32 kb
Raporteaza aceasta sursa 
#include <fstream>

using namespace std;

ifstream f("ciur.in");
ofstream g("ciur.out");

int n,nr,prim[100],i,j;

int main()
{
 f>>n;
 for(i=2;i<=n;i++)
    prim[i]=1;
 for(i=2;i<=n;i++)
 {
   if(prim[i])
   { nr++;
     for(j=2*i;j<=n;j+=i)
        {prim[j]=0;
        }
   }
 }
 g<<nr;

 return 0;
}