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Cod sursa(job #232937)
#include <fstream>
#include <string>
using namespace std;
int main()
{
bool ok[30000], i, j, n;
ifstream fin("ciur.in");
fin >> n;
fin.close();
for ( i = 0; i < 30000; i++)
ok[i] = true;
for ( i = 2; i * i <= n; i++)
if ( ok[i] )
{
j = 2;
while ( i * j <= n )
{
ok [i * j] = 0;
j++;
}
}
ofstream fout("ciur.out");
for ( i = 2; i <= n; i++)
if ( ok[i] )
fout << i << ' ';
fout.close();
return 0;
}