using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Home_task_5._1
{
    class Rectangle
    {
        private double sideA;
        private double sideB;


        public void SetsideA(double sideA)
        {
            if (sideA > 1)
                this.sideA = sideA;
            else
                Console.WriteLine("Error");
        }

        public double GetsideA()
        {
            return sideA;
        }


        public void SetsideB(double sideB)
        {
            if (sideB > 1)
                this.sideB = sideB;
            else
                Console.WriteLine("Error");
        }

        public double GetsideB()
        {
            return sideB;
        }


        public Rectangle(double sideA, double sideB) // Первый конструктор
        {
            this.sideA = sideA;
            this.sideB = sideB;
        }

        public Rectangle(double sideA) //Второй конструктор
        {
            this.sideA = sideA;
            this.sideB = 5; // Должна брать это значение когда я ввел только А
        }

        public Rectangle() //Третий конструктор
        {
            this.sideA = 3;
            this.sideB = 4; // Но она берет это
        }

        public void Inputs()
        {
            Console.WriteLine("sideA = {0} sideB = {1}", sideA, sideB);
        }

        public double Area()
        {
            double area = this.sideA * this.sideB;
            return area;
        }

        public double Perimeter()
        {
            double perimeter = 2 * (this.sideA + this.sideB);
            return perimeter;
        }

        public bool IsSquare()

        {
            return sideA == sideB;
        }
    }


    class Program
    {
        static void Main(string[] args)
        {
            var succ1 = double.TryParse(Console.ReadLine(), out var side1);
            var succ2 = double.TryParse(Console.ReadLine(), out var side2);
            Rectangle p1;
            if (succ1 && succ2)
                p1 = new Rectangle(side1, side2);
            else if (succ1)
                p1 = new Rectangle(side1);
            else
                p1 = new Rectangle();

            p1.Inputs();

            Console.WriteLine(p1.Area());
            Console.WriteLine(p1.Perimeter());
            Console.WriteLine(p1.IsSquare());
        }
    }
}