n = input() + "0"
cnt = 0
cnt1 = 0
cnt2 = 0
mark = "0"
for e in n:
    if e == "1":
        if mark == "0":
            cnt = 1
            mark = "1"
        else:
            cnt += 1
    else:
        if mark == "1":
            if cnt == 1:
                cnt1 += 1
            else:cnt2 += 1
            mark = "0"
if cnt1 == 2 and cnt2 == 0:print("Yes")
elif cnt1 == 0 and cnt2 == 1:print("Yes")
else:print("No")