#include <iostream>
#include <string>
class Date {
public:
    int day, month, year;
    explicit Date(int year, int month, int day) {
        this->day = day;
        this->month = month;
        this->year = year;
    }
    bool IsLeap() const {
        if (this->year % 100 == 0 && this->year % 400 != 0) return false;
        return this->year % 4 == 0;
    }
    std::string ToString() const {
        std::string day = this->day < 10 ? "0" +
            std::to_string(this->day) :
            std::to_string(this->day);
        std::string month = this->month < 10 ? "0" +
            std::to_string(this->month) :
            std::to_string(this->month);
        std::string year = std::to_string(this->year);
        if (this->year < 1000 && this->year > 99)
            year = "0" + std::to_string(this->year);
        if (this->year < 100 && this->year > 9)
            year = "00" + std::to_string(this->year);
        if (this->year < 10)
            year = "000" + std::to_string(this->year);
        return day + "." + month + "." + year;
    }
    Date DaysLater(int days) const {
        int m = this->month, d = this->day, y = this->year;
        int m2[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
        int i, k = 0, p, a;
        for (i = 0; i < m; i++)
            k = k + m2[i];
        k = k + d + days;
        int day_in_year = IsLeap() ? 366 : 365;
        if (k <= day_in_year) {
            if (IsLeap()) m2[2] = 29;
            for (i = 0; i < 13; i++) {
                p = k - m2[i];
                if (p <= m2[i + 1]) {
                    a = i + 1;
                    break;
                }
                else
                    k = p;
            }
            return Date(y, a, p);
        }
        else {
            k = k - day_in_year;
            for (i = 0; i < 13; i++) {
                p = k - m2[i];
                if (p <= m2[i + 1]) {
                    a = i + 1;
                    break;
                }
                else
                    k = p;
            }
            return Date(y + 1, a, p);
        }
    }
    int DaysLeft(const Date& date) const {
        int m = this->month, d = this->day, y = this->year;
        if (m < 3) {
            y--;
            m += 12;
        }
        int fir = 365 * y + y / 4 - y / 100 + y / 400 + (153 * m - 457) / 5 + d - 306;
        int m1 = date.month, d1 = date.day, y1 = date.year;
        if (m1 < 3) {
            y1--;
            m1 += 12;
        }
        int sec = 365 * y1 + y1 / 4 - y1 / 100 + y1 / 400 + (153 * m1 - 457) / 5 + d1 - 306;
        return fir > sec ? fir - sec : sec - fir;
    }
};