n = int(input())
A = list(map(int, input().split()))
A.sort()
z = 0
B = []
for a in A:
    if a == 0:
        z += 1
    else:
        B.append(a)
d = 10**18
for i in range(n-1):
    if A[i] == 0 or A[i+1] == 0:
        continue
    d = min(d, A[i+1]-A[i])

if d == 10**18:
    print('Yes')
    exit()

if d == 0:
    if len(set(B)) == 1:
        print('Yes')
    else:
        print('No')
    exit()

B.sort(reverse=True)
cur = B[0]+d
cnt = 0
for b in B:
    if (cur-b)%d != 0:
        print('No')
        exit()
    cnt += (cur-b)//d-1
    cur = b
if cnt <= z:
    print('Yes')
else:
    print('No')