规则Rules：
标准数独基础上，涂色区域内的数字必须组成从1~N的连续数字链条，链条只能链接水平或垂直相邻的单元格。
Classic rules applied. Additionally, digits in colored zones must form a chain of consecutive digits from 1~N by moving horizontally or vertically from one cell to the next.
◆例题Examples
◆在线涂鸦 Draw it Online
◆在线做 Do it by CTC
◆在线做 Do it by Penpa
