Fix the Lines

A line segment is said to be fixed if two distinct points on the line are fixed.
Given several lines on a plane, let's calculate the minimum number of points needed to fix these lines on the plane.

Input

One integer 't' stating the number of test cases, followed by 't' blocks.

One integer 'n' specifying the number of line segments, followed by n pairs of coordinates specifying the ends of the segments. All coordinates are at the format of (x, y). the number n does not exceed 7.

Output

One integer a line stating the points needed to fix the line segments.

Sample Input

1

2
1 1 2 1
2 2 3 2

Sample Output

4

1个回答

Csdn user default icon
上传中...
上传图片
插入图片
抄袭、复制答案,以达到刷声望分或其他目的的行为,在CSDN问答是严格禁止的,一经发现立刻封号。是时候展现真正的技术了!
立即提问
相关内容推荐