using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EqualPairs
{
    class Program
    {
        static void Main(string[] args)
        {
            int pairsNumber = int.Parse(Console.ReadLine());
            int pairsSum = 0, oldPairSum = 0;
            int pairDifference = 0, maxPairDifference = 0;

            int number1 = int.Parse(Console.ReadLine());
            int number2 = int.Parse(Console.ReadLine());

            oldPairSum = number1 + number2;
            for (int i = 1; i < pairsNumber; i++)
            {
                number1 = int.Parse(Console.ReadLine());
                number2 = int.Parse(Console.ReadLine());
                pairsSum = number1 + number2;
                pairDifference = Math.Abs(pairsSum - oldPairSum);
                maxPairDifference = Math.Max(pairDifference, maxPairDifference);
                oldPairSum = pairsSum;
            }
            if (maxPairDifference == 0)
            {
                Console.WriteLine($"Yes, value={oldPairSum}");
            }
            else
            {
                Console.WriteLine($"No, maxdiff={maxPairDifference}");
            }
        }
    }
}