#include <cstdint>
#include <chrono>


struct TimeDuration
{
    int64_t hours;
    int64_t minutes;
    int64_t seconds;
    int64_t milliseconds;

    int64_t minutes_absolute;
    int64_t seconds_absolute;
    int64_t milliseconds_absolute;

    bool negative;
};


class Timer
{
public:
    Timer();
    TimeDuration GetTimeLeft();
    void AddMinutes(int64_t minutes);
    void Clear();

private:
    std::chrono::system_clock::time_point end_time;
};

class StopWatch
{
public:
    StopWatch();
    TimeDuration GetTime();
    void Start();
    void Pause();
    void Resume();
    void Clear();

public:
    bool active = false;

private:
    std::chrono::system_clock::time_point start_time;
    std::chrono::system_clock::duration paused_duration;
    bool paused = false;
};