# たとえば3のところにある数と、3超でnum=iの個数、の合計が3の倍数であれば消せる
# それがすべての数で満たされるか

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

excess_test = False
for i in range(N, 0, -1):
    if A[i] > i:
        excess_test = True
if excess_test == True:
    print('No')
    exit()

multiple_test = True
exact = 0
for i in range(N, 0, -1):
    if (A[i]+exact)%i == 0:
        exact += (A[i]+exact)//i
    else:
        multiple_test = False
if multiple_test == True:
    print('Yes')
else:
    print('No')