Cod sursa(job #1780471)

Utilizator NinjaCubeMihai Radovici NinjaCube Data 16 octombrie 2016 11:43:16
Problema Ciurul lui Eratosthenes Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.31 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>
using namespace std;

int main()
{
unsigned long v[2000000],nr=0,i,j,n;
ifstream fin ("ciur.in");
ofstream fout ("ciur.out");
fin>>n;
for (i=2;i<=n;i++)
{
    if (v[i])
    {
        for(j=i*i;j<=n;j+=i) v[i]=1;
    }else nr=nr+1;
}
return 0;
fout<<nr;
}