from math import gcd
import sys

int1 = lambda x: int(x) - 1

# input = lambda: sys.stdin.buffer.readline()
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
i1 = lambda: int1(input())
mi = lambda: map(int, input().split())
mi1 = lambda: map(int1, input().split())
li = lambda: list(mi())
li1 = lambda: list(mi1())
lli = lambda n: [li() for _ in range(n)]

INF = float("inf")
mod = int(1e9 + 7)
# mod = 998244353

s = "0" + input() + "0"
c = s.count("01")
if c == 1:
    print("Yes" if s.count("11") else "No")
elif c == 2:
    print("Yes" if s.count("11") == 0 else "No")
else:
    print("No")