SameCouples

import java.util.Scanner;

public class Pr12SameCouples {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int n = Integer.parseInt(scan.nextLine());

        int prevSum = Integer.parseInt(scan.nextLine()) + Integer.parseInt(scan.nextLine());

        int maxDiff = 0;

        for (int i = 0; i < n - 1; i++) {
            int currentSum = Integer.parseInt(scan.nextLine()) +Integer.parseInt(scan.nextLine());

            int diff = Math.abs(currentSum - prevSum);

            if(diff != 0){
                if(diff > maxDiff){
                    maxDiff = diff;
                }
            }

            prevSum = currentSum;
        }

        if(maxDiff == 0){
            System.out.printf("Yes, value=%s", prevSum);
        } else {
            System.out.printf("No, maxdiff=%s", maxDiff);
        }
    }
}