#pragma once
#include <string>
class Date {
 private:
int year, month, day;

int MonthsGenerator(int value) const {
  int size;
  if (value == 1 || value == 3 || value == 5 || value == 7 ||  value ==8 ||
  value == 10 || value == 12) size = 31;
  if (value == 4 || value == 6 || value == 9 || value == 11) size =30;
  if (value == 2) {
    if (this->IsLeap()) size = 29;
    else
    size = 28;
  }
  return size;
}

std::string add0(std::string word, unsigned int type) const {
  for (; word.size() < type; word = '0' + word) {}
  return word;
}

std::string Removeint(int value) const {
  std::string newString ="";
  while (value > 0) {
    newString = static_cast<char>(value % 10 + 48) + newString;
    value /= 10;
  }
  return newString;
}

bool operator==(Date other) {
  if ((year == other.year)&&(month == other.month)&&(day == other.day)) {
    return true;
  } else {
      return false;
  }
}

bool operator!=(Date other) {
  if ((year != other.year) || (month != other.month) || (day != other.day)) {
    return true;
  } else {
      return false;
  }
}

 public:
Date(int year, int month, int day): year(year), month(month), day(day) {}

bool IsLeap() const {
  bool flag;
  if (year % 4 == 0 && year % 100 !=0) flag = true;
  if (year % 400 == 0) flag = true;
  if (year % 4 != 0) flag = false;
  return flag;
}

std :: string ToString() const {
  std::string barnYear, barnMonth, barnDay;
  int valYear = year, valMonth = month, valDay = day;
  std::string resString = add0(Removeint(valDay), 2) + '.'
  + add0(Removeint(valMonth), 2) + '.' + add0(Removeint(valYear), 4);
return resString;
}

Date DaysLater(int value) const {
  int barnDay = day + value, barnMonth = month, barnYear = year;
  while ((barnDay-1) / MonthsGenerator(barnMonth) > 0) {
    barnDay -= MonthsGenerator(barnMonth);
    barnMonth++;
    if (barnMonth > 12) {
      barnMonth -= 12;
      barnYear++;
    }
  }
return Date(barnYear, barnMonth, barnDay);
}

int DaysLeft(const Date& otherDate) const {
  int i = 0;
while(this->DaysLater(i) != otherDate) {
  i++;
  if (this->DaysLater(i) == otherDate) break;
}
return i;
}
};