#include <iostream>
#include <cmath>
#include <stdexcept>
#include <iomanip>
class Sat{
    int sati,minute,sekunde;
    public:
    Sat(){
        sati=0;
        minute=0;
        sekunde=0;
    }
    Sat(int h, int m, int s){
                auto k=h*3600+m*60+s;

        if(k>86400){
            k =abs( k-86400);
        Sat::sati=k/3600;
        int ost1=k%3600;
        Sat::minute = ost1/60;
        Sat::sekunde =ost1%60;
    }
    else{
        sati=h;
        minute=m;
        sekunde=s;
    }
    }
    friend Sat operator ++(Sat &s,int){
        Sat pomocni(s);
        s.sekunde++;
        if(s.sekunde>59) {
            s.sekunde = s.sekunde-60;
            s.minute++;
        }
        if(s.minute>59){
                s.minute = s.minute-60;
                s.sati++;
            }
        return pomocni;
    }
    friend Sat &operator ++(Sat &s){
        s.sekunde++;
        if(s.sekunde>59) {
            s.sekunde = s.sekunde-60;
            s.minute++;
        }
        if(s.minute>59){
                s.minute = s.minute-60;
                s.sati++;
            }
        return s;
    }
    friend Sat operator --(Sat &s,int){
        Sat pomocni(s);
        s.sekunde--;
        if(s.sekunde<0){
            s.sekunde=60+s.sekunde;
            s.minute--;
        }
        if(s.minute<0){
            s.minute=60+s.minute;
            s.sati--;
        }
        return pomocni;
    }
    friend Sat &operator --(Sat &s){
        s.sekunde--;
        if(s.sekunde<0){
            s.sekunde=60+s.sekunde;
            s.minute--;
        }
        if(s.minute<0){
            s.minute=60+s.minute;
            s.sati--;
        }
        return s;
    }
    friend Sat &operator +=( Sat &s, int broj){
        int ss=s.sati*3600+s.minute*60+s.sekunde+broj;
        s.sati=ss/3600;
        int ost1=ss%3600;
        s.minute=ost1/60;
        s.sekunde=ost1%60;
        return s;
    }
    friend Sat&operator -=( Sat &s, int broj){
        int ss=s.sati*3600+s.minute*60+s.sekunde-broj;
        s.sati=ss/3600;
        int ost1=ss%3600;
        s.minute=ost1/60;
        s.sekunde=ost1%60;
        return s;
    }
    friend Sat operator +(  Sat&s, int broj) {
        Sat s1(s);
        int ss=s1.sati*3600+s1.minute*60+s1.sekunde+broj;
        s1.sati=ss/3600;
        int ost1=ss%3600;
        s1.minute=ost1/60;
        s1.sekunde=ost1%60;
        return s1;
    }

    friend Sat operator -( const Sat &s, int broj){
        Sat s1(s);
        int ss=s1.sati*3600+s1.minute*60+s1.sekunde-broj;
        s1.sati=ss/3600;
        int ost1=ss%3600;
        s1.minute=ost1/60;
        s1.sekunde=ost1%60;
        return s1;
    }
    friend int operator -(const Sat &s1, const Sat &s2){
        auto ss1=s1.sati*3600+s1.minute*60+s1.sekunde;
        auto ss2=s2.sati*3600+s2.minute*60+s2.sekunde;
        ss1 = ss1-ss2;
        return  ss1;
    }
    friend std::ostream &operator <<(std::ostream &tok, const Sat &s){

        return tok<<std::setfill('0')<<std::setw(2)<<s.sati<<":"<<std::setfill('0')<<std::setw(2)<<s.minute<<":"<<std::setfill('0')<<std::setw(2)<<s.sekunde;   }
    static  bool DaLiJeIspravno(int  h, int m, int s){
        if(h<0 || h>23 || m<0 || m>59 || s<0 || s>59) return false;
        return true;
    }
    void Postavi(int h, int m, int s);
        int PostaviNormalizirano(int h, int m, int s);

    Sat &Sljedeci();
    Sat &Prethodni();
    Sat &PomjeriZa(int tmp);
    void Ispisi() const{
        std::cout<<std::setfill('0')<<std::setw(2)<<sati<<":"<<std::setfill('0')<<std::setw(2)<<minute<<":"<<std::setfill('0')<<std::setw(2)<<sekunde;
    }
    int DajSate() const{return sati;}
    int DajMinute() const{return minute;}
    int DajSekunde() const{return sekunde;}
    friend int BrojSekundiIzmedju( Sat &v1, Sat &v2);
    static int Razmak( Sat &v1, Sat &v2);
    };

        int Sat::PostaviNormalizirano(int h, int m, int s){

            if(h<-1000){
                h=h*(-1);
                if(m<0){
                    m=m*(-1);
                }
                if(s<0){
                    s=s*(-1);
                }
                int sek=h*3600+m*60+s;
                if(sek>86400){
                    while(sek>86400){
                        sek -=86400;
                    }
                }
                int n_h=sek/3600;
                int ost1=sek%3600;
                int n_m=ost1/60;
                int n_s=ost1%60;
                Sat::sati=n_h;
                Sat::minute=n_m;
                Sat::sekunde=n_s;
            }
            else if(h<0 && h>-24){
        h=24+h;
        Sat::sati=h;
        Sat::minute=m;
        Sat::sekunde=s;}

        else if(m<0){
            m=60+m;
            h=h-1;
            Sat::sati=h;
            Sat::minute=m;
            Sat::sekunde=s;
        }
        else if(s<0){
            s=60+s;
            m=m-1;
            Sat::sati=h;
            Sat::minute=m;
            Sat::sekunde=s;
        }
        else if(m>59){
            m=m-60;
            h=h+1;
            Sat::sati=h;
            Sat::minute=m;
            Sat::sekunde=s;
        }
        else if(s>59){
            s=s/60;
            m=m+s;
            s=0;
            Sat::sati=h;
            Sat::minute=m;
            Sat::sekunde=s;
        }
        else{
        int sekunde=h*3600+m*60+s;
        int ost_od_sek=abs(86400-sekunde);
         int h_n=ost_od_sek/3600;
        int ost1=ost_od_sek%3600;
         int m_n=ost1/60;
        int s_n=ost1%60;
        Sat::sati=h_n;
        Sat::minute=m_n;
        Sat::sekunde=s_n;
        }
    }
    void Sat::Postavi(int h, int m, int s){
        if(h<0 || h>23) throw std::domain_error("Neispravno vrijeme");
        else Sat::sati=h;
        if(m<0 || m>59) throw std::domain_error("Neispravno vrijeme");
        else Sat::minute=m;
        if(s<0 || s>59) throw std::domain_error("Neispravno vrijeme");
        else Sat::sekunde=s;

    }

    Sat &Sat::Sljedeci(){
         sekunde=sekunde+1;
        if(sekunde>59){
            sekunde=sekunde-60;
            minute++;
        }
        if(minute>59) {
            minute=minute-60;
            sati++;
        }
        if(sati>=24) sati=sati-24;
        return *this;
    }
    Sat &Sat::Prethodni(){
        sekunde=sekunde-1;
        if(sekunde<0){
            sekunde=sekunde*(-1);
            sekunde=60-sekunde;
            minute--;
            if(minute<0){
                minute=minute*(-1);
                minute=60-minute;
                sati--;
            }
            if(sati<0){
                sati = sati*(-1);
                sati=24-sati;
            }
        }

        return *this;
    }
     Sat &Sat::PomjeriZa( int tmp){
        int tmp1 = sati*3600+minute*60+sekunde+tmp;
        if(tmp1 >=86400){
            int tmp2 = abs(86400-tmp1);
            sati=tmp2/3600;
            int ost1=tmp2%3600;
            minute=ost1/60;
            sekunde=ost1%60;
        }
        else{
            sati=tmp1/3600;
            int ost1=tmp1%3600;
            minute=ost1/60;
            sekunde=ost1%60;

        }
        if(sekunde<0){
            sekunde=sekunde*(-1);
            sekunde=60-sekunde;
            minute--;
            if(minute<0){
                minute=minute*(-1);
                minute=60-minute;
                sati--;
            }
            if(sati<0){
                sati=sati*(-1);
                sati=24-sati;
            }
        }
        return *this;
    }
    int BrojSekundiIzmedju( Sat&v1,  Sat &v2){
        int sekunde1 = v1.sati*3600+v1.minute*60+v1.sekunde;
        int sekunde2 = v2.sati*3600+v2.minute*60+v2.sekunde;
        return sekunde1-sekunde2;
    }
    int Sat::Razmak( Sat &v1,  Sat &v2){
        int sekunde1 = v1.sati*3600+v1.minute*60+v1.sekunde;
        int sekunde2 = v2.sati*3600+v2.minute*60+v2.sekunde;
        return sekunde1-sekunde2;
    }


int main ()
{
  Sat s1(11, 4, 39);
  std::cout << s1 << std::endl;
  Sat s2(25, 150, 1000);
  std::cout << s2 << std::endl;
  std::cout << s1 - s2 << std::endl;
  std::cout << s1 + 100 << std::endl;
  std::cout << s1 << std::endl;
  std::cout << s1 - 100 << std::endl;
  std::cout << s1 << std::endl;
  s2 = s1 += 100;
  std::cout << s2 << std::endl;
    return 0;
}