Еднакви двойки

import java.util.Scanner;

public class ednakvidvoiki {

    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);

    int n = Integer.parseInt(scan.next());
    int sum = 0 ;
    int diff=0;
    int sum2 = 0;

    for(int i=1 ; i<= n ; i++) {
        int cn = scan.nextInt();
        int cn2 = scan.nextInt();
        sum = cn + cn2;
        if(sum > sum2) {
            diff = sum - sum2;
        }else {
            diff= sum2 - sum;
        }
        sum2 = sum;
    }

    if( diff == 0) {
        System.out.println("Yes,value =" + sum);
    }else {
        System.out.println("No,maxdiff=" + diff);
    }



    }




    }