def main():
    n = input()
    c = n.count('1')
    if c == 1:
        exit(print('No'))
    elif c == 2:
        exit(print('Yes'))

    cc = ('0' + n).count('01')
    if cc == 1:
        print('Yes')
    else:
        print('No')


if __name__ == "__main__":
    main()