N = int(input())
a = list(map(int,input().split()))

b = []
for i in range(N - 1):
	b.append(a[i + 1] - a[i])
s = sum(b)
flag = True
for i in b:
	if b % N != 0:
		flag = False
if s == 0 and flag:
	print('Yes')
else:
	print('No')