B  Get The Gold

All submissions for this problem are available.
A man in his deathbed told his lazy son that throughout his life he had worked very hard. With the money he saved he has bought gold. This gold is hidden in a forest which is represented by a 2 dimensional plane in 3 dimensional space. There are two special trees A and B in the forest. The son needs to find these trees, and a special stone S. He must walk from S to A along the plane representing the forest, and then take a right turn and walk the same distance (ie. walk perpendicular to SA), to get to a point C. He must then come back to S. Next, he should walk from S to B, take a left turn and then walk that distance again to reach the point D. Half way between C and D is the place where the gold is hidden.
The forest is a plane defined by the points S(x_{0},y_{0},z_{0}), A(x_{1},y_{1},z_{1}) and B(x_{2},y_{2},z_{2}). S, A, and B will not be collinear. You need to find the coordinates of the gold. Each input set consists of the coordinates of the points S, A and B in separate lines. It is guaranteed that the origin O(0,0,0) will always be above the forest surface. That is, you standing on the forest surface, if you look up, (0, 0, 0) will be in the sky.
Input
 The first line contains one integer, T, the number of test cases. The description of each test case follows:
 Three lines will be printed for each test case.
 The first line will contain three spaceseparated numbers x_{0}, y_{0}, z_{0}.
 The second line will contain three spaceseparated numbers x_{1}, y_{1}, z_{1}.
 The third line will contain three spaceseparated numbers x_{2}, y_{2}, z_{2}.
 An empty line will be printed after each test case.
 All the numbers will have two digits after the decimal point.
Output
For each test case, print three real numbers, x y z, in a new line where (x,y,z) are the coordinates of the gold. Your answer will be considered correct if the absolute error is less than 10^{6}.
Constraints
 1 ≤ T ≤ 100000
 10^{6} ≤ x_{0}, y_{0}, z_{0}, x_{1}, y_{1}, z_{1}, x_{2}, y_{2}, z_{2} ≤ 10^{6}
Example
Input: 2 0.00 0.00 1.00 0.00 1.00 1.00 2.00 1.00 1.00 8.00 4.65 5.72 6.14 3.43 3.87 5.50 1.56 8.60 Output: 1.00000000 2.00000000 1.00000000 2.29963939 6.31303751 4.33640147
Explanation
Test case 1: The figure below shows the scenario:
The plane represented by the three input points is the plane z = 1. We have S(1.00, 1.00, 1.00). Going from S to A, taking a right turn, and going the same distance as SA will take you to the point C(1.00, 1.00, 1.00). Going from S to B, taking a left turn, and going the same distance as SB will take you to the point D(1.00, 3.00, 1.00). The gold is at the midpoint of segment CD, which is (1.00, 2.00, 1.00).
Author:  zubaerkh 
Tags  zubaerkh 
Date Added:  10112017 
Time Limit:  3 sec 
Source Limit:  50000 Bytes 
Languages:  C, CPP14, JAVA, PYTH, PYTH 3.6, PYP3 
Comments
 Please login at the top to post a comment.
SUCCESSFUL SUBMISSIONS
Fetching successful submissions
HELP
If you are still having problems, see a sample solution here. 