Bus - Java

package TrialExam16Dec18;

import java.util.Scanner;

public class Task_5 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int startPeople = Integer.parseInt(scanner.nextLine());
        int nStations = Integer.parseInt(scanner.nextLine());

        int sumIn = 0;
        int sumOut = 0;

        for (int i = 1; i <= nStations; i++) {
            int nOut = Integer.parseInt(scanner.nextLine());
            int nIn = Integer.parseInt(scanner.nextLine());

            if (i % 2 == 1) {
                nIn += 2;
            }

            if (i % 2 == 0) {
                nOut += 2;
            }

            sumIn += nIn;
            sumOut += nOut;
        }

        int finalN = startPeople + sumIn - sumOut;
        System.out.printf("The final number of passengers is : %d", finalN);

    }
}