Computational Thinking, Linear Algebra, Python, Jupyter Notebook, Math.
at one item in our index map: 1940_Cincinnati_Reds_Team_Issue has index 9991173. This only shows up once in the destination list: [i for i,x in enumerate(source) if x == 9991173] [119077649] source[119077649], destination[119077649] (9991173, 9991050) Now, we want to check which page is the source