import java.util.Scanner;

public class OddEven {
    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 = 1; i <= n ; i++){
            int num = Integer.parseInt(scanner.nextLine());

            if (i % 2 == 0 ){
                evenSum = evenSum + num;
            }else{
                oddSum = oddSum + num;
            }
        }
        if (evenSum == oddSum){
            System.out.printf("Yes%nSum = %d", evenSum);
        }else{
            System.out.printf("No%nDiff = %d", Math.abs( evenSum - oddSum));
        }
    }
}