N = int(input())
A = [0] + list(map(int, input().split()))

ruimemo = [0] * (N + 2)

for i in range(N, 0, -1):

    # ruimemo を累積
    ruimemo[i] += ruimemo[i + 1]

    # A[i] + ruimemo[i] が捌くべき負荷
    x = A[i] + ruimemo[i]
    if x%i != 0:
        exit(print('No'))
    
    ruimemo[i - 1] += x//i

print('Yes')