This is cheating.
it's not, this is a direct and clever solution to the specified problem which would not work for other arbitrary Cody problems, hence not cheating (in my book)
Energy of a photon
Permute diagonal and antidiagonal
Add two numbers
Can you reshape the matrix?
Create a 3D rotation matrix from roll-pitch-yaw angles
Invert a 3D rotation matrix
Relative points in 2D: problem 2
Composing relative poses in 2D: problem 1
Relative points in 2D: problem 3
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