Cod sursa(job #1862009)

Utilizator DariusXDXDarius Suditu DariusXDX Data 29 ianuarie 2017 14:34:01
Problema Ciurul lui Eratosthenes Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.31 kb
Raporteaza aceasta sursa 
#include <iostream>

using namespace std;
int v[200000];
int main()
{
    int i,j,x=0,n;
    cin>>n;
    for(i=2;i<=n;i++)
    {
        if(v[i]==0)
        for(j=i+i;j<=n;j=j+i)
        v[j]=1;
    }
    for(i=2;i<=n;i++)
    {
        if(v[i]==0)
        x++;
    }
    cout<<x;
    return 0;
}