Planar Reflections Solution Codeforces

Planar Reflection Solution Codeforces Gaurang has grown up in a mystical universe. He is faced by nn consecutive 2D planes. He shoots a particle of decay age kk at the planes. A particle can pass through a plane directly, however, every plane produces an identical copy of the particle going in the opposite direction with a decay age k−1k−1. If … Read more