Cod sursa(job #1054272)

Utilizator deleted_ac6c9a20b3d0aa08DELETED deleted_ac6c9a20b3d0aa08 Data 13 decembrie 2013 16:16:34
Problema Ciurul lui Eratosthenes Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.37 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <cmath>
#include <fstream>

using namespace std;

int main()
{
	int n, i, k=0, v[299999];

	ifstream f("ciur.in");
	ofstream g("ciur.out");

f>>n;
if ((n>=2)&&(n<3))
k++;
if (n>=3)
k+=2;

	for (i = 5; i <= n; i+=2)
	{
		v[i]=0;

		if (i%3==0)
        v[i] = 1;

		if (v[i] == 0)
        k++;


	}

	g<<k;



}