using System;

namespace Z12_Equal_Pairs
{
	class MainClass
	{
		public static void Main ()
		{
			int n = int.Parse (Console.ReadLine ());
			double Paris = 0;
			double oldParis = 0;
			double Razlika = 0;

			for (int i = 0; i < n; i++) {
				double Odd = double.Parse (Console.ReadLine ());
				double Even = double.Parse (Console.ReadLine ());
				Paris = Odd + Even;
				Razlika = Math.Max (Paris, oldParis) - Math.Min (Paris, oldParis);
				oldParis = Paris;
			}

			if (n == 1) {
				Console.WriteLine ("Yes, value={0}", Razlika);
			} else {
				if (Razlika == 0) {
					Console.WriteLine ("Yes, value={0}", Paris);
				} else {
					Console.WriteLine ("No, maxdiff={0}", Razlika);
				}
			}
		}
	}
}