Typically, an edit field is used to enter a numeric value needed by the program, such as the point size of a font.
通常编辑字段用于输入程序所需的数值，如字号磅数。
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。
At that point, size becomes probably the most important factor.
那时候，规模是最主要的决定因素。
At that point, size becomes probably the most important factor.
那时候，规模是最主要的决定因素。
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