N = int(input())
lsA = [0]+list(map(int,input().split()))
add = 0
for i in range(N):
    if lsA[i] > i:
        print('No')
        exit()
for i in range(N,0,-1):
    if (lsA[i]+add) % i == 0:  
        add += (lsA[i]+add) // i
        lsA[i] = 0
    else:
        print('No')
        exit()
print('Yes')