Cod sursa(job #1308728)

Utilizator alinmocanu95FMI Alin Mocanu alinmocanu95 Data 4 ianuarie 2015 16:37:29
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.35 kb
Raporteaza aceasta sursa 
#include<iostream>
#include<fstream>
#define nmax 2000005
using namespace std;
int main()
{
    int n,i,j,c;
    bool a[nmax];
    ifstream f("ciur.in");
    ofstream g("ciur.out");
    f>>n;
    for(i=1;i<=n;i++) a[i]=0;
    c=1;
    for(i=3;i<=n;i+=2)
    if(a[i]==0)
    {for(j=i+i;j<=n;j+=i) a[j]=1;
    c++;}
    g<<c;
    return 0;
}