Cod sursa(job #3284840)

Utilizator ceoveecalinCeovee Militaru David Calin ceoveecalin Data 12 martie 2025 11:23:13
Problema Ciurul lui Eratosthenes Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.32 kb
Raporteaza aceasta sursa 
#include <iostream>

using namespace std;
int n, i, j, nr;
bool a[2000001];
int main()
{
    cin>>n;
    a[0]=a[1]=1;
    for(i=2; i<=n; i++)
    {
        if(a[i]==0)
        {
            nr++;
            for(j=2; j*i<=n; j++)
                a[i*j]=1;
        }
    }
    cout<<nr;
    return 0;
}