S=input()
if S.count("1")<=1:
  print("No")
  exit()
if S.count("1")<=2:
  print("Yes")
  exit()
S="0"+S
k=0
for i in range(len(S)-1):
  if S[i]=="0" and S[i+1]=="1":
    k+=1
if k<=1:
  print("Yes")
  exit()
print("No")