规则Rules：
标准数独基础上，每个区域内的数字都能按从左到右、从上到下的顺序，组成一个电子表的时刻。
Classic rules applied. Additionally, numbers in each cage forms a time of electric clock in order (left to right, up to down).
◆例题 Example
◆在线涂鸦 Draw it Online
◆在线做 Do it by CTC
◆在线做 Do it by Penpa
