#include <iostream>
using namespace std;

date.h 
class date {
    int days;

    date(int d = 0) : days(d) {}
    date& operator++() { days++; return *this; }
    date& operator+=(int n) { days += n; return *this; }
    friend date operator+(const date& d, int n) { return date(d.days + n); }
    friend int operator-(const date& d1, const date& d2) { return d1.days - d2.days; }
    friend bool operator==(const date& d1, const date& d2) { return d1.days == d2.days; }
    friend ostream& operator<<(ostream& os, const date& d) {
        return os << "Date(" << d.days << ")";
    }
};


int main() {
    date d;
    operator++(d);
    d.operator+=(280);
    const date e{operator+(d, 7)};
    int n{operator-(e, d)};
    const date midpoint{operator+(d, n/2)};

    if (operator==(d, d)) {
        operator<<(cout, d) << " ";
        operator<<(cout, operator++(d)) << "\n";
        operator<<(operator<<(cout, d), "\n");
    }
    return EXIT_SUCCESS;
}