Tiffany's Irregular Upper and Lower Border lamps are distinguished by the openwork crown edge, which is meant to represent a branch, shrubbery or tree.

蒂凡尼的不规则的上，下边界灯的特点是镂空冠的边缘，其目的是要描绘出树枝，灌木或树。

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For the purposes of this problem, you may assume that the trees are of point size, and that any tree (point) lying exactly on the border of a triangle is considered to be in the triangle.

为简化题目，你可以认为树都一个无穷小的点，而精确位于三角形边上的树应算作在三角形内的。

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