#include <iostream>
#include <cmath>
using namespace std;

bool isLeap(int year) {
    return (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0));
}

int daysInMonth(int year, int month) {
    switch (month) {
        case 2:
            return (isLeap(year)) ? 29 : 28;
        case 4:
        case 6:
        case 9:
        case 11:
            return 30;
        default:
            return 31;
    }
}

int daysSince1900(int year, int month, int day) {
    int days = 0;
    for (int i = 1900; i < year; i++) {
        days += 365 + isLeap(i);
    }
    for (int i = 1; i < month; i++) {
        days += daysInMonth(year, i);
    }
    days += day - 1;
    return days;
}

int main() {
    int year1, month1, day1;
    cout << "Hello Codeauri Family,Enter the  first date here (YYYY MM DD): ";
    cin >> year1 >> month1 >> day1;

    int year2, month2, day2;
    cout << "Hello Codeauri Family,Enter the  Second date here (YYYY MM DD): ";
    cin >> year2 >> month2 >> day2;

    int days1 = daysSince1900(year1, month1, day1);
    int days2 = daysSince1900(year2, month2, day2);

    int difference = abs(days2 - days1);
    cout << "Well, the Number of days between " << year1 << "-" << month1 << "-" << day1;
    cout << " and " << year2 << "-" << month2 << "-" << day2 << ": ";
    cout << difference << endl;

    return 0;
}