import sys
N, = map(int, input().split())
N+=1
X = [0] + list(map(int, input().split()))
for i in range(1, N):
    if X[i] > i:
        print("No")
        sys.exit()
c = 0
for i in range(N-1, 0, -1):
    if X[i] + c == 0:
        continue
    if (X[i] + c) % i == 0:
        c += (X[i] + c)//i
        continue
    print("No")
    sys.exit()
print("Yes")