Cod sursa(job #863239)

Utilizator GrandmasterSoucup Bogdan Grandmaster Data 23 ianuarie 2013 17:09:50
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.31 kb
Raporteaza aceasta sursa 
#include<iostream>
#include<fstream>
using namespace std;
int n,g;
char l[20000000];
int main()
{
	int j,i;
	ifstream r("ciur.in");
	ofstream z("ciur.out");
	r>>n;
	for(i=2; i<=n; i++)
		l[i]=1;
	for(i=2; i<=n; i++)
		if(l[i]!=0)
		{
			g++;
		for(j=i+i; j<=n; j+=i)
				l[j]=0;
		}
		z<<g;
}