Z12_Equal_Pairs

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);
                }
            }
        }
    }
}