Cod sursa(job #2383160)

Utilizator Benten3000Alexandru Benteu Benten3000 Data 19 martie 2019 09:40:22
Problema Ciurul lui Eratosthenes Scor 50
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.31 kb
Raporteaza aceasta sursa 
#include <bits/stdc++.h>
using namespace std;
ifstream fin("ciur.in");
ofstream fout("ciur.out");
int main()
{
    int n,c=0;
    fin>>n;
    int v[n+5];
    memset(v,0,sizeof(v));
    for (int i=2;i<=n;++i)
        if (v[i]==0){c++;
        for (int j=2;j<=n/i;++j)
        v[i*j]=1;}
    fout<<c;
}