Cod sursa(job #1462150)

Utilizator tudorgalatanRoman Tudor tudorgalatan Data 17 iulie 2015 11:21:38
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.32 kb
Raporteaza aceasta sursa 
#include <fstream>

using namespace std;

bool c[200001];
int n,i,j,nr;

int main()
{
    ifstream f("ciur.in");
    ofstream g("ciur.out");
    f >> n;
    for(i=2;i<=n;i++)
    {
        if(c[i]==0)
            nr++;
        for(j=i+i;j<=n;j=j+i)
            c[j]=1;
    }
    g<<nr;
    return 0;
}