Cod sursa(job #569271)

Utilizator david95szabo david emanuel david95 Data 1 aprilie 2011 11:25:06
Problema Ciurul lui Eratosthenes Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.42 kb
#include<fstream>
using namespace std;
ifstream fin("ciur.in");
ofstream fout("ciur.out");
int main()
{
	int p[100000], n, i, j;
	fin >> n;
	for ( i = 1; i <= n; i++ ) 
		p[i] = 1;
		p[1] = 0;
	for ( i = 2; i * i <= n; i++ )
		if (p[i] == 1)
			for ( j = i * 2; j <= n; j = j + i)
				p[j] = 0;
	        for ( i = 1; i <= n; i++)
			   if(p[i]==1) fout << i << " ";
	fin.close();
	fout.close();
	return 0;
}