Cod sursa(job #1742288)

Utilizator IoanaRocIoana Roceanu IoanaRoc Data 16 august 2016 10:24:29
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.34 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("ciur.in");
ofstream g("ciur.out");
int v[2000000];
int main()
{   int n,cate,i,j;
    f>>n;
    cate=0;
    for(i=2;i<=n;i++){
        if(v[i]==0){cate++;
            for(j=2*i;j<=n;j+=i)
                v[j]=1;
        }
    }
    g<<cate;
    return 0;
}