Time Limit:3000ms Memory Limit:65536KB
Description
A polycube is a solid made by gluing together unit cubes (one unit on each edge) on one or more
faces. The figure in the lower-left is not a polycube because some cubes are attached along an
edge.
For this problem, the polycube will be formed from unit cubes centered at integer lattice points in
3-space. The polycube will be built up one cube at a time, starting with a cube centered at (0,0,0). At
each step of the process (after the first cube), the next cube must have a face in common with a cube
previously included and not be the same as a block previously included. For example, a 1-by-1-by-5
block (as shown above in the upper-left polycube) could be built up as:
(0,0,0) (0,0,1) (0,0,2) (0,0,3) (0,0,4)
and a 2-by-2-by-2 cube (upper-right figure) could be built as:
(0,0,0) (0,0,1) (0,1,1) (0,1, 0) (1,0,0) (1,0,1) (1,1,1) (1,1, 0)
Since the surface of the polycube is made up of unit squares, its area is an integer.
Write a program which takes as input a sequence of integer lattice points in 3-space and determines
whether is correctly forms a polycube and, if so, what the surface area of the polycube is.
Input
The first line of input contains a single integer N, (1 <= N <= 1000) which is the number of data sets that
follow. Each data set consists of multiple lines of input. The first line contains the number of points P,
(1 <= P <= 100) in the problem instance. Each succeeding line contains the centers of the cubes, eight
to a line (except possibly for the last line). Each center is given as 3 integers, separated by commas.
The points are separated by a single space.
Output
For each data set, you should generate one line of output with the following values: The data set
number as a decimal integer (start counting at one), a space and the surface area of the polycube if it
is correctly formed, OR, if it is not correctly formed, the string Ħ°NOĦħ a space and the index (starting
with 1) of the first cube which does not share a face with a previous cube. Note that the surface area
includes the area of any included holes.
Sample Input
4
5
0,0,0 0,0,1 0,0,2 0,0,3 0,0,4
8
0,0,0 0,0,1 0,1,0 0,1,1 1,0,0 1,0,1 1,1,0 1,1,1
4
0,0,0 0,0,1 1,1,0 1,1,1
20
0,0,0 0,0,1 0,0,2 0,1,2 0,2,2 0,2,1 0,2,0 0,1,0
1,0,0 2,0,0 1,0,2 2,0,2 1,2,2 2,2,2 1,2,0 2,2,0
2,1,0 2,1,2 2,0,1 2,2,1
Sample Output
1 22
2 24
3 NO 3
4 72