The CE digital company has built an Automatic Painting Machine (APM) to paint a flat board fully covered by adjacent
non-overlapping rectangles of different sizes each with a predefined color.
To color the board, the APM has access to a set of brushes. Each brush has a distinct color C. The APM picks one
brush with color C and paints all possible rectangles having predefined color C with the following restrictions:
To avoid leaking the paints and mixing colors, a rectangle can only be painted if all rectangles immediately
above it have already been painted. For example rectangle labeled F in Figure 1 is painted only after
rectangles C and D are painted. Note that each rectangle must be painted at once, i.e. partial painting of one
rectangle is not allowed.
You are to write a program for APM to paint a given board so that the number of brush pick-ups is minimum.
Notice that if one brush is picked up more than once, all pick-ups are counted.
The first line of the input file contains an integer M which is the number of test cases to solve (1<=M<=10).
For each test case, the first line contains an integer N, the number of rectangles, followed by N lines
describing the rectangles. Each rectangle R is specified by 5 integers in one line: the y and x coordinates
of the upper left corner of R, the y and x coordinates of the lower right corner of R, followed by the color-code of R.
Color-code is an integer in the range of 1...20.
Upper left corner of the board coordinates is always (0,0).
Coordinates are in the range of 0...99.
N is in the range of 1...15.
One line for each test case showing the minimum number of brush pick-ups.
0 0 2 2 1
0 2 1 6 2
2 0 4 2 1
1 2 4 4 2
1 4 3 6 1
4 0 6 4 1
3 4 6 6 2