using System;

namespace Week3
{
  class Program
  {
    static void Main(string[] args)
    {
      int n = int.Parse(Console.ReadLine());
      int currentSum = 0, diff = 0, lastSum = 0;
      for (int i = 1; i <= 2*n; i++)
      {
        currentSum += int.Parse(Console.ReadLine());
        if (i % 2 == 0 && i > 2)
        {
          diff = Math.Max(Math.Abs(currentSum - lastSum), diff);
        }
        if (i % 2 == 0 && i != 2*n)
        {
          lastSum = currentSum;
          currentSum = 0;
        }
      }

      if (diff != 0)
      {
        Console.WriteLine("No, maxdiff={0}", diff);
      }
      else
      {
        Console.WriteLine("Yes, value={0}", currentSum);
      }
    }
  }
}