规则Rules：
标准数独基础上，提示符号V表示其相邻两格之和为5，或者其上方的数字大于下方的数字。
Classic rules applied. Additionally, clue V means the numbers around it have a sum of 5, or the numbers above it is larger than the number below it.
◆在线涂鸦 Draw it Online
◆在线做 Do it by CTC
◆在线做 Do it by Penpa
