Cod sursa(job #1047470)

Utilizator CostinVFMI CostinVictorGabriel CostinV Data 4 decembrie 2013 16:34:04
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.34 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
int main(){
    ifstream in("ciur.in");
    ofstream out("ciur.out");
    int v[200000]={0},i,g=0,j,n;
    in>>n;
    for(i=2;i<=n;i++)
        if(v[i]==0)
    {
        for(j=2*i;j<=n;j=j+i)
            v[j]=1;
        g++;
    }
    out<<g;
    in.close();
    out.close();
    return 0;
}