def solve_a():
    n = str(input())
    cnt = 0
    flag = 0
    for i in range(len(n)):
        if int(n[i]) == 1:
            cnt += 1
            if flag == 1:
                flag = 2
        if int(n[i]) == 0:
            if flag != 2:
                flag = 1
    if cnt == 2:
        print('Yes')
    elif cnt == 1:
        print('No')
    elif flag == 2:
        print('No')
    else:
        print('Yes')

if __name__ == '__main__':
    solve_a()