#include<iostream>
using namespace std;

class Triangle
{
private:
	int a,b,c ;
public:
	void init() {
		cout << "Въведете страни на триъгърника:" << endl;
		cin >> a;
		cin >> b;
		cin >> c;
	}

	void output() {
		cout << a << endl;
		cout << b << endl;
		cout << c << endl;
	}
	int perimetur() {
		int per;
		per = a + b + c;
		return per;
	}
	float lice() {
		float lice;
		lice = sqrt((a + b + c)*(b + c)*(a + c)*(a + b));
		return lice;
	}
	bool ravnostranen() {
		if (a == b == c) return true;

	}
};
void main() {
	Triangle a1;
	setlocale(LC_ALL, "Bulgarian");
	a1.init();
	cout<<a1.perimetur()<<endl;
	cout << a1.lice() << endl;
	if (a1.ravnostranen())cout << "ebago"<<endl;
	else cout << "strugare" << endl;
	system("pause");


}