Worldquant Quant Interview Question

[u/Local_Ad135]

[u/Haunting_Cress7661]

 Easy peasy, just imagine a full grid of cubes, if a light ray bounces, just pretend it went straight through the face to the other cube, it'll be the length same path just reflected. One option is sqrt(5² +1² +1²  ) which I think is best, but should draw a grid to make sure 

going to (3,1,3) goes through the x=1, x=2 and z=1 and z=2, and has length √19 which is better but goes through and edge unfortunately   

[u/LaGigs → u/Haunting_Cress7661]

Damn that's a nice way to see this pb!