Problema: http://www.pbinfo.ro/?pagina=probleme&id=510&force_reload&cpp

#include <iostream>
using namespace std;

int main(){
	int n, x[1005];
	cin  >> n;	
	for(int i = 0 ; i < n ; ++ i)
		cin >> x[i];
	bool sortat = false;
	while(! sortat)
	{
		sortat = true;
		for(int i = 0 ; i < n - 1 ; i++)
			if(x[i] > x[i+1])
			{
				int aux = x[i];
				x[i] = x[i+1];
				x[i+1] = aux;
				sortat = false;
			}
	}
	for(int i = 0 ; i < n ; ++ i)
	{
		bool prim = true;
		if(x[i] < 2)
			prim = false;
		if(x[i] % 2 == 0 && x[i] > 2)
			prim = false;
		for(int d = 3 ; d * d <= x[i] ; d += 2)
			if(x[i] % d == 0)
				prim = false;
		if(prim)
			cout << x[i] << " ";
	}
	return 0;
}