Cod sursa(job #2023624)

Utilizator Tudor-IoanPrelipcean Tudor-Ioan Tudor-Ioan Data 19 septembrie 2017 10:17:42
Problema Ciurul lui Eratosthenes Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.34 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>
using namespace std;

int main()
{ifstream f("ciur.in");
ofstream g("ciur.out");
    int N,i,j,cont;
    char v[2000009]={1};
    f>>N;
    cont=0;
    for (i=2;i<N;i++)
        {if (v[i])
        cont++;
        for (j=i*2;j<N;j=j+i)
            v[j]=0;}
        g<<cont;
    return 0;
}