#include <iostream>
#include <iomanip>
using namespace std;

class Rectangle
{
public:
    Rectangle() :length(1), width(1){}

    void setLength(double a)
    {
        if (0.0 < a && a < 20.0)
            length = a;
        else
            length = 1;
    }
    void setWidth(double a)
    {
        if (0.0 < a && a < 20.0)
            width = a;
        else
            width = 1;
    }
    double getLength() const { return length; }
    double getWidth() const { return width; }
    double perimeter() const { return (length + width)*2.0; }
    double area() const { return length * width; }
protected:
    double length, width;
};

//StudybarCommentBegin
int main()
{
    Rectangle r;
    double length, width;

    //    cout<<"please input the length of Rectangle:";
    cin >> length;
    //    cout<<"please input the width of Rectangle:";
    cin >> width;
    r.setLength(length);
    r.setWidth(width);
    cout << "the perimeter is:" << setprecision(2) << fixed << r.perimeter() << endl;
    cout << "the area is:" << setprecision(2) << fixed << r.area() << endl;
    return 0;
}
//StudybarCommentEnd