Cod sursa(job #3298436)

Utilizator Aditu2121Sandu Adrian Aditu2121 Data 29 mai 2025 20:51:27
Problema Ciurul lui Eratosthenes Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.33 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>
using namespace std;
ifstream fin ("ciur.in");
ofstream fout ("ciur.out");
int n,v[1000001],C;
int main()
{
    fin>>n;
    for(int i=2; i*i<=n; ++i)
        for(int j=i; j*i<=n; ++j)
            v[j*i]=1;
    for(int i=2; i<=n; ++i)
        if(v[i]==0)
            C++;
    fout<<C;
    return 0;
}