#include <iostream>
#include <cmath>

using namespace std;

class Triangle {
private:
    int x1 = 0, x2 = 0, x3 = 0, x4 = 0, y1 = 0, y2 = 0, y3 = 0, y4 = 0;

public:

    Triangle() {}

    Triangle(int _x1, int _x2, int _x3, int _x4, int _y1, int _y2, int _y3, int _y4) {
        x1 = _x1;
        x2 = _x2;
        x3 = _x3;
        x4 = _x4;
        y1 = _y2;
        y3 = _y3;
        y4 = _y4;
    }

    double GetAB() {
        return sqrt(pow(y2 - y1, 2) + pow(x2 - x1, 2));
    }
    double GetBC() {
        return sqrt(pow(y3 - y2, 2) + pow(x3 - x2, 2));
    }
    double Parimeter() {
        return 2 * (GetAB() + GetBC());
    }
    double Square() {
        return GetAB() * GetBC();
    }

};

int main()
{
    int x1 = -3, x2 = -3, x3 = 5, x4 = 5, y1 = -1, y2 = 3, y3 = 3, y4 = -1;

    Triangle triangle(x1, x2, x3, x4, y1, y2, y3, y4);
    cout << "S = " << triangle.Square() << endl;
    cout << "P = " << triangle.Parimeter() << endl;

    return 0;
}