Cod sursa(job #2383165)

Utilizator Benten3000Alexandru Benteu Benten3000 Data 19 martie 2019 09:45:03
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.33 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;
    char v[2000005];
    for (int i=2;i<=n;++i)
        v[i]=0;
    for (int i=2;i<=n;++i)
        if (v[i]==0){c++;
        for (int j=i+i;j<=n;j+=i)
        v[j]=1;}
    fout<<c;
}