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

using namespace std;


int main()
{
    int a, b,c, ugao1, ugao2, ugao3;
    cout <<"Unesite stranice trougla: \n"<< endl;
    cin >>a;
    cin >>b;
    cin >>c;
    if (((a && b&&c)>0) && ((a+b)>c) || ((a+c)>b) || ((b+c)>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((b*b+a*a-c*c)/(2*b*c));
        double maxu=ugao1;
        if (ugao2>maxu) maxu=ugao2;
        if (ugao3>maxu) maxu=ugao3;

       double max1 = (maxu*180)/PI;
     //double max1=int(maxu);
        double minute = (max1-int(max1))*60;
         double sekunde = (minute-int(minute))*60;
        cout <<"Najveci ugao trougla sa stranicama "<< a <<", "<< b << " i "<< c << "ima " <<  (max1) << " 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;
}