20.CountWorkingDays

package com.company;

import java.text.*;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;

public class CountWorkingDays {
    public static void main(String[] args){
        Scanner s = new Scanner(System.in);

        DateFormat format = new SimpleDateFormat("dd-MM-yyyy");

        Date[] holidays = {
                new Date(2000, 1, 1),
                new Date(2000, 3, 3),
                new Date(2000, 5, 1),
                new Date(2000, 5, 6),
                new Date(2000, 5,24),
                new Date(2000, 9, 6),
                new Date(2000, 9, 22),
                new Date(2000, 10, 1),
                new Date(2000, 12, 24),
                new Date(2000, 12, 25),
                new Date(2000, 12, 26)

        };

        try {
            Date startDate = format.parse(s.nextLine());
            Date endDate = format.parse(s.nextLine());

            Calendar start = Calendar.getInstance();
            start.setTime(startDate);

            Calendar end = Calendar.getInstance();

            end.setTime(endDate);

            int cntr = 0;

            for (Date i = start.getTime(); start.before(end); start.add(Calendar.DATE, 1), i = start.getTime()){
                Calendar c = Calendar.getInstance();
                c.setTime(i);
                int currentDay = c.get(Calendar.DAY_OF_WEEK);

                Date currentDate = new Date(2000, i.getMonth(), i.getDate());

                if(!Arrays.asList(holidays).contains(currentDate) && (currentDay != 6 && currentDay != 7)){
                    cntr++;
                }
            }

            System.out.println(cntr);

        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}