import java.util.Scanner;

public class f10HalfSumElement {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = Integer.parseInt(scan.nextLine());
        int max = Integer.MIN_VALUE;
        int allSum = 0;
        for(int i=0 ; i<n ; i++){
            int num = Integer.parseInt(scan.nextLine());
            allSum = allSum + num;
            if(num > max){
                max = num;
            }
        }
        if(max == allSum - max){
            System.out.println("Yes Sum = " + max);
        }else{
            System.out.println("No Diff = " + Math.abs(max -(allSum - max)));
        }
    }
}