#include
#include
#include
using namespace std;
int main()
{
double x;
cout << setprecision(4);
cout << " x sqrt(x) x^2\n\n";
for(x = 2.0; x <= 20.0; x++) {
cout << setw(7) << x << " ";
cout << setw(7) << sqrt(x) << " ";
cout << setw(7) << x*x << '\n';
}
return 0;
}