N = ["0"] + list(input())
if N.count("1") == 1:
    print("No")
    exit()
if N.count("1") == 2:
    print("Yes")
    exit()
 
flag = 0
flag2 = 0
for i in range(len(N) - 1):
    if N[i] == "0" and N[i + 1] == "1":
        flag = 1
        if flag2:
            print("No")
            exit()
    if N[i] == "1" and N[i + 1] == "0" and flag:
        flag2 = 1
print("Yes")