#include <iostream>
#include <cmath>

using namespace std;

class Figure {
    protected:
        float a;
        float b;
        float p;

    public:
        void show() {
            cout << "Info:" << endl;
            calculate();
            info();
        }

        virtual float calculate() = 0;

        virtual void info() = 0;
};

class IsoscelesTriangle : public Figure {
    public:
        IsoscelesTriangle() {a = b = 0;}

        IsoscelesTriangle(float x, float y) {
            a = x;
            b = y;
        }

        float calculate() {
            p = a + 2 * b;

            cout << "p of isosceles triangle = " << p << endl;
            cout << endl;

            return p;
        }

        void info() {
            cout << "Info about isosceles triangle:" << endl;
            cout << "a = " << a << endl;
            cout << "b = " << b << endl;
            cout << endl;
        }

        friend istream& operator >> (istream& is, IsoscelesTriangle& a);

        bool operator > (const IsoscelesTriangle& a) {return this->a > a.a && b > a.b;}
};

istream& operator >> (istream& is, IsoscelesTriangle& a) {
    cout << "Enter info about isosceles triangle:" << endl;
    cout << "a = "; is >> a.a;
    cout << "b = "; is >> a.b;
    cout << endl;

    return is;
}

class RightTriangle : public Figure {
    public:
        RightTriangle() {a = b = 0;}

        RightTriangle(float x, float y) {
            a = x;
            b = y;
        }

        float calculate() {
            p = a + b + sqrt(a * a + b * b);

            cout << "p of right triangle = " << p << endl;
            cout << endl;

            return p;
        }

        void info() {
            cout << "Info about right triangle:" << endl;
            cout << "a = " << a << endl;
            cout << "b = " << b << endl;
            cout << endl;
        }

        friend istream& operator >> (istream& is, RightTriangle& a);

        bool operator > (const RightTriangle& a) {return this->a > a.a && b > a.b;}
};

istream& operator >> (istream& is, RightTriangle& a) {
    cout << "Enter info about right triangle:" << endl;
    cout << "a = "; is >> a.a;
    cout << "b = "; is >> a.b;
    cout << endl;

    return is;
}

int main() {

    int count;
    bool res;

    cout << "Enter count of objects: ";
    cin >> count;

    IsoscelesTriangle arr1[count];

    for (int i = 0; i < count; i++) {
        cout << "Enter " << i + 1 << " isosceles triangle:" << endl;
        cin >> arr1[i];
    }

    for (int i = 1; i < count; i++) {
        res = arr1[i - 1] > arr1[i];

        cout << "(" << i << " obj > " << i + 1 << " obj) = ";

        if (res) cout << "true" << endl;
        else cout << "false" << endl;
    }

    cout << endl;

    RightTriangle arr2[count];

    for (int i = 0; i < count; i++) {
        cout << "Enter " << i + 1 << " right triangle:" << endl;
        cin >> arr2[i];
    }

    for (int i = 1; i < count; i++) {
        res = arr2[i - 1] > arr2[i];

        cout << "(" << i << " obj > " << i + 1 << " obj) = ";

        if (res) cout << "true" << endl;
        else cout << "false" << endl;
    }

    cout << "------" << endl << endl;

    Figure* obj;

    obj = new IsoscelesTriangle(2, 3);

    obj->show();

    obj = new RightTriangle(3, 4);

    obj->show();

}