Cod sursa(job #906725)

Utilizator IvanoiuStefan97Ivanoiu George Stefan IvanoiuStefan97 Data 7 martie 2013 02:14:04
Problema Ciurul lui Eratosthenes Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 0.31 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("ciur.in");
ofstream g("ciur.out");
int main()
{long i,n,sol=0,j;
 char v[2000003];
    f>>n;
    for(i=2;i<=n;i++)
        if(v[i]==false)
    {
        sol++;
        for(j=2*i;j<=n;j+=i)
            v[j]=true;
    }
 g<<sol;
}