#pragma once
#include <memory>
#include <cmath>
#include <string



class Figure {
 public:
virtual std::string Name() = 0;
virtual double Perimeter() = 0;
virtual double Area() = 0;
};

class Triangle: public Figure {
 public:
double per, area;
Triangle(double a, double b, double c) {
per = a + b + c;
double ger = per / 2;
area = sqrt(ger * (ger - a) * (ger - b) * (ger - c));
}
std::string Name() {
return "TRIANGLE";
}
double Perimeter() {
return per;
}
double Area() {
return area;
}
};

class Rect: public Figure {
 public:
double per, area;
Rect(double width, double height) {
per = 2 * (width + height);
area = width * height;
}
std::string Name() {
return "RECT";
}
double Perimeter() {
return per;
}
double Area() {
return area;
}
};

class Circle: public Figure {
 public:
double per, area;
const double pi = 3.14;
Circle(double r) {
per = 2 * pi * r;
area = pi * pow(r, 2);
}
std::string Name() {
return "CIRCLE";
}
double Perimeter() {
return per;
}
double Area() {
return area;
}
};

std::shared_ptr<Figure> CreateFigure(std::istringstream &is) {
using std::make_shared;
std::string figure_t;
int64_t a, b, c;
is >> figure_t;
if (figure_t == "RECT") {
is >> a >> b;
return make_shared<Rect>(a, b);
}
if (figure_t == "TRIANGLE") {
is >> a >> b >> c;
return make_shared<Triangle>(a, b, c);
}
if (figure_t == "CIRCLE") {
is >> a;
return make_shared<Circle>(a);
}
}