N = input()
c = N.count('1')

if c==1:
    print('No')
elif c==2:
    print('Yes')
else:
    N = '0'+N
    run = 0
    
    for i in range(len(N)-1):
        if N[i:i+2]=='01':
            run += 1
    
    if run==1:
        print('Yes')
    else:
        print('No')