import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		long[] a = new long[n];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextLong();
		}
		sc.close();

		Arrays.sort(a);
		long max = 0;
		long min = 9;
		long z = 0;
		long mind = 1000000000000000000L;
		for (int i = 0; i < n; i++) {
			if (a[i] == 0) {
				z++;
			} else {
				max = Math.max(max, a[i]);
				min = Math.min(min, a[i]);
				if (i > 0) {
					mind = Math.min(mind, a[i] - a[i - 1]);
				}
			}
		}

		for (int i = (int) z + 1; i < n; i++) {
			long d = a[i] - a[i - 1];
			if (mind == 0) {
				if (d > 0) {
					System.out.println("No");
					return;
				}
			} else if (d % mind != 0 || d == 0) {
				System.out.println("No");
				return;
			} else {
				z -= d / mind - 1;
				if (z < 0) {
					System.out.println("No");
					return;
				}
			}
		}
		System.out.println("Yes");
	}
}