#include <math.h>
#include <stdlib.h>
#include <iostream>
using namespace std;

double* ellips(int a, int b)

{
 double S, L;
 const double Pi = 3.14159;
 S = Pi * a * b;
 L = 2 * Pi * pow((1 / 2 * (pow(a, 2) + pow(b, 2))), (1 / 2));
 double* mas = new double [2];
 mas [0] = S;
 mas [1] = L;
 return mas;
}

int main()
{
 double a, b;

 cout << "a=";
 cin >> a;

 cout << "\nb=";
 cin >> b;
 double* ptr;
 ptr = ellips(a, b);
 cout << "S=" << ptr[0];

}