Equal Pairs

import java.util.Scanner;

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

        int n = Integer.parseInt(scan.nextLine());
        int maxDifference = Integer.MIN_VALUE;
        boolean isDifference = false;
        int lastNumber = 0;

        int numberOne = Integer.parseInt(scan.nextLine());
        int numberTwo = Integer.parseInt(scan.nextLine());

        lastNumber = numberOne + numberTwo;
        int equalPart = lastNumber;

        for (int i = 0; i < n - 1; i++) {
            int firstNumber = Integer.parseInt(scan.nextLine());
            int secondNumber = Integer.parseInt(scan.nextLine());
            if (firstNumber + secondNumber == lastNumber) {
                equalPart = lastNumber;
            } else {
                isDifference = true;
                int difference = Math.abs(lastNumber - (firstNumber + secondNumber));
                if (difference > maxDifference) {
                    maxDifference = difference;
                }
            }
            lastNumber = firstNumber + secondNumber;
        }
        if (isDifference) {
            System.out.println("No, maxdiff=" + maxDifference);
        } else {
            System.out.println("Yes, value=" + equalPart);
        }
    }
}