import sys
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 63 - 1
mod = 998244353

n = input()

ans = 'No'

if n.count('1') == 2:
    ans = 'Yes'
n += '#'
x = ''
for i in range(len(n) - 1):
    if n[i] != n[i+1]:
        x += n[i]

if n.count('1') > 1 and (x == '10' or x == '1'):
    ans = 'Yes'
print(ans)