Bus

package h_ExamPreparation.PreExam;

import java.util.Scanner;

public class Problem05 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int pax  = Integer.parseInt(scanner.nextLine());
        int busStops  = Integer.parseInt(scanner.nextLine());

        double oddPax = 0;
        double evenPax = 0;
        double totalPax = 0;

        for (int i = 1; i <= 2*busStops ; i++) {
            int n  = Integer.parseInt(scanner.nextLine());
            if (i % 2 == 0){
                evenPax += n;
            }else {
                oddPax += n;
            }
            totalPax = pax + evenPax - oddPax;
            if (busStops % 2 != 0){
                totalPax += 2;
            }
        }
        System.out.printf("The final number of passengers is : %.0f",totalPax);

    }
}