Cod sursa(job #1120401)

Utilizator catazepGeorgescu Catalin-Marian catazep Data 24 februarie 2014 23:47:54
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.29 kb
Raporteaza aceasta sursa 
#include<iostream>
#include<fstream>
using namespace std;
int p,v[2000000],n,nr;
int main()
{int i=2;nr=1;p=2;
ifstream f("ciur.in");
ofstream g("ciur.out");
f>>n;
while(p*p<n)
	{ i=2;
		while(i*p<=n)
		{v[i*p]=1;i++;}
	p++;}
	for(int j=3;j<=n;j++)
		if(v[j]==0)
			nr++;
		g<<nr;
}