规则Rules：
标准数独基础上，每个区域内的多位数是平方数（从左到右，上到下观察）。
Classic rules applied. Additionally, numbers in colored zones should be square numbers with order (left→right, up→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
