#include <iostream>
#include <cmath>
#define PI 3.14

using namespace std;

int main()
{   int a, b, c;
    double ugao1, ugao2, ugao3;
    double alfa, beta, gama;
    cout << "Unesi stranice trougla:\n"<<endl;
    cin >> a;
    cin >> b;
    cin >> c;

     if ((a >0 && b>0 && c>0) && ((a+b)>c || (a+c)>b || (c+b)>a) )
     {
        ugao1=acos((a*a+b*b-c*c)/(2*a*b));
        ugao2=acos((a*a+c*c-b*b)/(2*a*c));
        ugao3=acos((c*c+b*b-a*a)/(2*b*c));
        double maxu=ugao1;
        if (ugao2>maxu) maxu=ugao2;
        if (ugao3>maxu) maxu=ugao3;
        double max1=(maxu*180)/PI;
        double minute=max1-int(max1);
        double sekunde=minute-int(minute);

     cout << "Najveci ugao sa stranicama: " << a << ", " << b << " i "<< c << " je  \n" << int (maxu) << " stepeni "
     << int (minute)  << " minuta " << " i "
     << int (sekunde) << " sekundi." << endl; }
     else
        cout <<" Ne postoji trougao cije su duzine stranica: " << a << b << " i " << c << endl;


    return 0;
}