import java.util.Scanner;

public class OddEvenSum_10 {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine());
        int evenSum = 0;
        int oddSum = 0;

        for (int i = 0; i < n; i++) {
            int current = Integer.parseInt(scanner.nextLine());
            if (i % 2 == 0) {
                evenSum = evenSum + current;

            } else {
                oddSum = oddSum + current;
            }
        }

        if (evenSum == oddSum) {
            System.out.println("Yes");
            System.out.printf("sum = %d", evenSum);
        } else {
            int diff = Math.abs(evenSum - oddSum);
            System.out.println("No");
            System.out.printf("diff = %d", diff);


        }
    }
}