using System;

public class Program

{

    public static void Main()

    {

        int numberOfTuples = int.Parse(Console.ReadLine());

        int sumOfTuples = 0;

        int diff = 0;

        for (int i = 0; i < numberOfTuples; i++)

        {

            int firstNumber = int.Parse(Console.ReadLine());

            int secondNumber = int.Parse(Console.ReadLine());

            // increment with the sum of the tuple

            sumOfTuples += (firstNumber + secondNumber);

        }

        int sumByTuple = sumOfTuples % numberOfTuples;

        // if the reminder is 0 the tuples do not have equal sums

        if (sumByTuple == 0)

        {

            // and then get the whole integer division number

            Console.WriteLine(String.Format("Yes, value={0}", sumOfTuples / numberOfTuples));

        }

    }

}