def main1(n,a):
  a=[0]+a
  cnt=0
  for i in reversed(range(1,n+1)):
    if a[i]>i:return False
    if a[i]==0 and cnt==0:continue
    if (a[i]+cnt)%i==0:
      cnt+=(a[i]+cnt)//i
    else:
      return False
  return True
if __name__=='__main__':
  n=int(input())
  a=list(map(int,input().split()))
  ret1=main1(n,a)
  print('Yes' if ret1 else 'No')