There are N cats. We number them from 1 through N.

Each of the cats wears a hat. Cat i says: "there are exactly a_i different colors among the N - 1 hats worn by the cats except me."

Determine whether there exists a sequence of colors of the hats that is consistent with the remarks of the cats.

Constraints

* 2 ≤ N ≤ 10^5
* 1 ≤ a_i ≤ N-1

Input

Input is given from Standard Input in the following format:


N
a_1 a_2 ... a_N


Output

Print `Yes` if there exists a sequence of colors of the hats that is consistent with the remarks of the cats; print `No` otherwise.

Examples

Input

3
1 2 2


Output

Yes


Input

3
1 1 2


Output

No


Input

5
4 3 4 3 4


Output

No


Input

3
2 2 2


Output

Yes


Input

4
2 2 2 2


Output

Yes


Input

5
3 3 3 3 3


Output

No
N = int(input())
A = list(map(int, input().split()))

if len(set(A)) == 1:
    if A[0] == N-1 or A[0] <= N // 2:
        print("Yes")
    else:
        print("No")
elif len(set(A)) == 2:
    M = max(A)
    m = min(A)
    if M-m != 1:
        print("No")
    else:
        if A.count(m) < M and 2*(M-A.count(m)) <= A.count(M):
            print("Yes")
        else:
            print("No")
else:
    print("No")
