规则Rules
填入1~4，使得每行、列、宫内数字不重复。提示表示这一段连续白格内数字的和。
Write 1~4, to make numbers no repeated in each Row, Column and Box. The clue is the sum of the next part consecutive white cells.
◆在线涂鸦 Draw it Online
◆在线做 Do it by CTC
◆在线做 Do it by Penpa
