Cod sursa(job #1490941)

Utilizator AditzuGrigoruta Adrian Aditzu Data 24 septembrie 2015 15:06:58
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.29 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>

using namespace std;
ifstream in("ciur.in");
ofstream out("ciur.out");
char v[2000001];
int main()
{int n,i,j,c=0;
    in>>n;
    for(i=2;i<=n;i++)if (v[i]==0){
           c++;
         for(j=i;j<=n;j+=i)v[j]=1;
    }
    out<<c;
}