#include <iostream>
#include <math.h>
using namespace std;

class triangle
{
public:
    int a, b, c, p, P;
    float S;
    triangle(int a, int b, int c) {



    }
    int per()
    {
        P = a + b + c;
        p = P / 2;
        return P;
    }

    int square()
    {
        S = sqrt(p * (p - a) * (p - b) * (p - c));
        return S;
    }

};

int main()
{
    triangle nya;
    cin >> nya.a;
    cin >> nya.b;
    cin >> nya.c;
    cout <<
    return 0;
}