Cod sursa(job #2356327)

Utilizator AlbertSimaAlbert Sima Gabriel AlbertSima Data 26 februarie 2019 16:57:02
Problema Ciurul lui Eratosthenes Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.35 kb
Raporteaza aceasta sursa 
#include <bits/stdc++.h>
using namespace std;

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

bool p[10000000000];
long long n,i,j,k;
int main()
{
   f>>n;
   for(i=2;i<=n;i++)
   {
       if(p[i]==0 && i%2!=0)
       {
            for(j=i+i;j<=n ;j=j+i)
                p[j]=1;
            k++;
       }
   }
   g<<k+1;
    return 0;
}